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Hi everyone.



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So in this video we are going to on some inbuilt functions of.



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But Eddie So the first function that we will look to to start to use the land function.



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So if you remember we have already implemented our own land function but this is already present in



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C++ so the name of the function is string land.



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This function is inverted.



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So what this tingling function will take it will take.



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String name as input order against it.



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Correct Barry.



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The name with the correct bit at is input.



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So if you would read like this.



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So let us create.



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So this is character I'm creating a character input.



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Eddie let's say the size is HUNDRED AND IF YOU WERE dig the input now you will call this function string



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land.



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So how do we call this function.



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So let us with the answer inevitable.



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I wouldn't call the function string linked and I will give input as parameter and then you can print



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the land very simple.



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So let us write the code but one thing.



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So before writing the code this string length function is actually implemented in our head to file and



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the name of the head the file is C string.



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So if you want to use this function you have to include this defined.



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So let's write the code no



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so all the functions that we are going to discuss in this video I'd actually present in C string had



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to fight so C string.



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Now let us create our first arrays so string when little size is entered.



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I will take input from they use it string one and let us call the function so I will the answer inevitable



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lent the name of the function is SDR LDA in SDR alien string land and I will give a string one as input.



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And now let us try to bring Deland so let's run our program



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so net to the string is hello and you can see the output is 5.



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So let us also print land here.



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So



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now again let's turn our program and let's say this time my input is ABC.



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So the land is full and we have to it in the quarter for the land function.



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So how this in built land function will work.



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So this and world function will do the exact same thing that we were doing for example if your string



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is a b c d and obviously a little present.



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So this string then function it will just do the same thing as we did in our function.



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It will start from me then B then C then D and medical regional it will stop and it will write down



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the land which is full.



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So exactly the same code that we have written in order to see these second inbuilt function.



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So the second invalid function it this used to compare two strings.



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So given two strings and you have to check whether the two strings are equal on article.



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So the inbuilt function the need of the inbuilt function is string compared SDR C MP string compare



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and it will take two strings as input.



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Obviously it has two big two strings to compare it.



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So it will take string one and it will take a strings to string two.



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Now it will not return a boolean value.



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Basically it will return a zero or a non-zero value and zero non-zero.



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So if it is returning zero so that means the might do strings are equal.



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And if it isn't attending a non zero value.



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So this is non-zero so it will return do things that it will return a zero value or a non-zero value



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if it is returning 0.



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That means my two strings are equal and if it is returning non-zero value that means that two strings



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are not equal simple.



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So let us write the code and let's see let's see in action to test coming down these two lines



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so create an idea at a string to size is rendered and let us take both the strings and put so string



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wants to do so I will call the function string compared I will give first string I will pass second



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string so if this function is returning visible net means that those things are equal.



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So if the two strings that equal I can print equal



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in the old part I can print an article



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and now we will run our program there does desktop program



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so let's say the first string is hello and second string is also Hello.



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So both those things are equal.



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So that's why equal is getting printed.



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I just tested one more time.



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So the first a string is ABC.



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And the second string is ABC.



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So they are not equal.



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ABC and they really are not equal.



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So let's test it one more time.



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So first string is ABC second string is ACB.



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Again these two things are not equal.



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So that's why the output is coming out do we not equal so how does that string compare function will



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work.



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Let us try to learn.



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So this stink compared function actually takes boosting that input so what it will do so let's say this



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is my string when and this is my string to so let's say my string when is ABC and obviously then and



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the second string is ABC and obviously nil.



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So in this case in this case the board the strings are equal.



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So my output will be equal and it will have done zero.



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Let's see how we're doing.



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Let's see how it will be done zero.



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So what it will do it will reduce a practice or so protect it from me.



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So a minus a.



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So these are correct.



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So and we know whenever you are doing character minus character.



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So this is nothing but in Deja minus Deja.



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So that character available will be converted to it.



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Ask.



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And so basically I am doing ninety seven minus nine defendants output will be zero.



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Then we will compare.



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We will have practice these two characters.



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So B minus B again zero and then the total character.



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So basically C minus C again zero so we are getting zeros at all the time.



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So that's why this function will return zero.



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And if this is it are done in zero that means all the characters are equal in the given string.



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Perfect.



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Now let us consider a case of non zero not equal so let's say my first string string 1 is actually ABC



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and string 2 is actually ACB.



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Now these two things are not equal.



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So let's see what our function will return what I was doing some bear function will return.



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So subtract a minus C so e might NSA 90000 minus 97 0.



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Then subtract B from C so B minus C.



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Now what does this.



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This is ninety eight and this is ninety nine so you will get minus one.



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So as soon as you get the value which is different from zero basically as soon as you get a non-zero



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value then dusting combat function will are done that value.



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So in this case stink compare function will return minus 1 and if it isn't attending a non-zero value



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that means these two strings the given two strings are not equal so that is the working off string compare



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function now can you implement string compare function yourself.



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Yes definitely we can.



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What we have to do is 1.0 at this position take one at this position compared both of them and move



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ahead as soon as that if you encounter.



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If you find out that the elements are different you will stop.



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So basically I am writing the pseudo code for you.



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You can definitely coded for yourself but you can do so.



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Let us take a variable i equals zero.



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So I am taking a variable life for same.



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So basically first you can check what you can do.



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So let me implement these things combined function for yourself.



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So I am implementing string combat function for you so that they will be the C V.



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We are implementing the function to



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there's sure to be a K so I am implementing a string compare function differently.



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So might might return David rebellion but there are two strings that equal or not.



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And let's say string compared on.



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So this is OK so let's name it.



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My and compare my string compare what it will take it will take boosting Z input.



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So this is String String 1 and the second string will be



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string 2 but you have to do you have to just do data and check whether they are equal or not.



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So first of all let us find our dear land so if what is the function of finding the land is the alien.



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So if their lands are different.



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If string my land is not close to the land of



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if their lands are different that means they are not equal.



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So you can detect leader down faults from here correct.



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Now what you have to do you have to compare each and every correct.



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So if we're comparing each and every character I just need to iterate.



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So there are two ways of hydrating first.



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You can write like this.



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I's listing SDR alien of string when



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and a listless so compared the I yet corrected.



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So if the I yet get a bit of string when is not equal to the I yet corrected often string to so you



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can read unfolds and finally you can pretend to connect.



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So this is the first to be rating.



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So let us check our program so I will call the function



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so let's let's combine this.



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Let's copy this.



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So this is my string compared.



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I will pass two strings string when answering do so.



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This milestone can sting combat function is going to call this function and then type is a billion.



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So let us test our program so the first string is hello.



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Second string is also hello and the output is in the article.



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Let us tested one more time for nautical keys.



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So if my first string is left to ABC and sorry this is BSE and the second string is b c so they are



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nautical



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and the second off dating basically instead of using string meant function we seen the last radio we



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can use and that is correct.



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So what can I do I can write like this.



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So this is basically a string when string of a So this is string when I get corrected is not equal to



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Dean native character



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so there are two ways of treating.



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So this one and the previous one.



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So let's test this one also



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first thing is hello.



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Second string is also Hello.



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They are equal now the first string is let's say a b c d and second string is e only so they are not



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equal.



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So what I'm doing in this function.



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So first of all I am digging through strings of input then I am finding out their length.



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So if there lends an article definitely David in order to be close so I can then likely false from it



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that I use for today and I do so.



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One thing is very clear at this point both the strings have the same blend.



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So the first testing is a BCG and the second string is ABC.



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If then what will happen.



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Yeah.



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I will start from zero.



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So this is I and I will move in this direction.



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Simple.



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You are competing guy you are trusting one with the iconic posting to compete everyday they adequately



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move ahead to compare B to be dead equal move where to compare C would see that equal move ahead.



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Now compare David F so they are not equal.



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So as soon as they are not equal you will it unfolds and suppose if this is D.



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So what will happen this condition will become false and all just all decided equal so you will return.



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So that's how this is working and there are two ways of doing things so the first one the previous one



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was very simple just like we used to doing at a equals you do a list and end it a plus plus and what



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is n and is actually these string lent off string when you can write string two because they have the



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same blend.



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So this was the previous one code that we have written and the second one is using the null corrector



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approach.



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So there are two ways of writing you can choose anyone.



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Now one thing that I want to clear here is basically that I am returning bool but the actual string



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compare function.



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I told you so it will return a zero value or a non-zero value so it's working is different and I hope



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you can definitely implement the code for the inbuilt string combat function for yourself it is going



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to be very very easy.



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You just have to return.



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So instead of boolean what you will do you just will change the return type.



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So instead of returning false you cannot write this statement because you have to do DNA in digital



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value so let's make it bool here.



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So consider it as an exercise try to write the code for the inbuilt string compare function.



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So now let us see the third and build function so we have seen lend function we have seen compared boosting



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function.



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Now the third function is actually copy string function.



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So this is also in function but we have to do we have to copy one string into another string so the



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name of the function is actually string copy.



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So this is string S.B. VI SDR sleepy VI string copy function.



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It will take boosting as input.



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So first one is the destination string and the second one is actually solves the string and what is



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the difference.



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So what will happen.



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So the content of the source of string would get copied into my destination string for example.



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This is the first listing hello and this is your second string.



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So in order to copy the content of a and b you can use this functions don't copy.



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So you will write like this string copy copy the content of a in dooby simple copy the content of a



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and b for example.



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This is you listing A's.



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Let's say this is correct Betty.



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So this is easier and better.



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And the string is ABC B's or so bad and the string is the E F.



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So if you wouldn't call the function string copy if you look right back on my e or if you write a comma



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B then what will happen.



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The content of B will get copied inside.



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So the B content of being will get copied.



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So instead of ABC it will become the F and if you were trying to print the value of a.



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So the value of A's actually the F no do not take my words.



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So let us best have a called so we need two strings and let us initialize those two things.



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So the first string instead of taking input.



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Let us give the value here on the.



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So the first thing is a basically



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and the second string is actually that's called the F first is ABC.



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The second is the F so I am not taking in anymore.



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And so this is this comment.



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This also.



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So what do we wanted.



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So I want to call the function string copy.



237

00:17:11,010 --> 00:17:17,340

So first let us Sprint devalue before copy and we will print devalue after copying.



238

00:17:17,340 --> 00:17:19,590

So before.



239

00:17:19,800 --> 00:17:28,480

So what are the values we photocopying see out string when and let us also print string to



240

00:17:41,970 --> 00:17:49,010

so I am printing string witnessing to be photocopy and we will also print after a copy.



241

00:17:49,140 --> 00:17:55,600

So this is after a copy and here I will call the function string copying.



242

00:17:55,620 --> 00:17:59,500

So SDR S.B. VI string copying first.



243

00:17:59,520 --> 00:18:03,870

So what I want to do I want to copy the content of string to interesting one.



244

00:18:03,930 --> 00:18:07,430

So first you have to write the destination string then.



245

00:18:07,860 --> 00:18:08,140

Okay.



246

00:18:08,150 --> 00:18:11,470

So I want to copy the content of string two into one.



247

00:18:11,470 --> 00:18:17,720

So this is string to copy the content of string to and string one.



248

00:18:17,780 --> 00:18:25,000

So let's see.



249

00:18:25,080 --> 00:18:29,540

So this is before copy the content of a string when is ABC.



250

00:18:29,610 --> 00:18:35,340

Now see after copying the content of string when changed to the F and the content of string to remains



251

00:18:35,340 --> 00:18:36,400

the same.



252

00:18:36,570 --> 00:18:41,460

Obviously the content of string will remain same because we are copying the content of string to undo



253

00:18:41,460 --> 00:18:42,000

string one.



254

00:18:42,000 --> 00:18:44,220

So string one was initially ABC.



255

00:18:44,250 --> 00:18:49,440

Now it is the F.



256

00:18:49,510 --> 00:18:58,380

So now let's try to understand how the in built a string copy function books.



257

00:18:58,400 --> 00:19:11,370

So basically what I did here so my first instinct was so my string one it was actually ABC and what



258

00:19:11,370 --> 00:19:12,450

was a string two.



259

00:19:12,450 --> 00:19:18,780

So this was the F then I'm copying the content of a string to do string one.



260

00:19:18,810 --> 00:19:19,620

So what will happen.



261

00:19:19,980 --> 00:19:21,620

So the E F will get copied.



262

00:19:21,630 --> 00:19:28,670

So the e f or the E F will come here and also so there is no character here also and here also.



263

00:19:28,680 --> 00:19:30,660

So what this string copy function will do.



264

00:19:30,660 --> 00:19:32,400

It will copy the null character also.



265

00:19:32,400 --> 00:19:37,090

So instead of the instead of the usual right null so that's why.



266

00:19:37,380 --> 00:19:39,310

What is the content of string when now.



267

00:19:39,360 --> 00:19:43,220

So it is containing the E F then then and then.



268

00:19:44,370 --> 00:19:48,880

So then you will call the function c out it alone LeBron.



269

00:19:48,930 --> 00:19:52,010

D take it because it will encounter no light at this point.



270

00:19:52,010 --> 00:19:57,530

So one thing to remember that string copy function so this listing can be function.



271

00:19:57,530 --> 00:20:03,400

Also copy none so it will also copy detailed character.



272

00:20:03,750 --> 00:20:05,860

This one character.



273

00:20:06,090 --> 00:20:12,650

Okay so this is important thing to remember for distinct copy function so if I will write like this



274

00:20:12,800 --> 00:20:19,090

string copy letters string 1 and I want to copy.



275

00:20:19,090 --> 00:20:19,990

Hello.



276

00:20:19,990 --> 00:20:22,100

So I can also do this.



277

00:20:22,300 --> 00:20:23,080

What will happen.



278

00:20:23,080 --> 00:20:25,360

Hello will get copied and do string 1.



279

00:20:25,480 --> 00:20:30,670

So let's see so instead of string 2 you can write Hello.



280

00:20:30,760 --> 00:20:32,320

So you can give a string here also.



281

00:20:33,010 --> 00:20:34,450

So now let us start program



282

00:20:39,260 --> 00:20:42,200

so you can see string 1 was initially ABC.



283

00:20:42,240 --> 00:20:43,490

Now it is hello.



284

00:20:43,640 --> 00:20:48,710

And obviously I didn't do anything with strings do so string two is remaining same.



285

00:20:48,710 --> 00:20:50,270

Now how it is working.



286

00:20:50,270 --> 00:20:52,450

So basically again the string copy function.



287

00:20:52,460 --> 00:20:53,450

What it will do.



288

00:20:53,450 --> 00:21:00,830

So first of all it will copy the content of Halo so string 1 was actually DCF.



289

00:21:01,780 --> 00:21:06,410

So it is string when was actually containing ABC.



290

00:21:07,400 --> 00:21:09,190

And then so it will happen.



291

00:21:09,200 --> 00:21:11,860

Halo will get copied and also the note is.



292

00:21:11,960 --> 00:21:12,930

So here do it.



293

00:21:12,950 --> 00:21:19,910

What will happen so remove this one etch e n and all and this string complete string copy function it



294

00:21:19,910 --> 00:21:22,120

will put the null connector by itself.



295

00:21:22,250 --> 00:21:27,740

So this is not correct that will get automatically inserted will automatically appended by the string



296

00:21:27,740 --> 00:21:29,570

copy function.



297

00:21:29,750 --> 00:21:35,480

So the question is can you implement string copy function yourself so can you implement string copy



298

00:21:35,480 --> 00:21:36,490

function yourself.



299

00:21:36,490 --> 00:21:39,440

I am giving you the idea and take it as a homework.



300

00:21:39,440 --> 00:21:41,470

You can definitely implemented for example.



301

00:21:42,560 --> 00:21:46,540

So let's take one example and I will give you the idea.



302

00:21:46,850 --> 00:21:48,560

For example this is string 1.



303

00:21:48,560 --> 00:21:56,300

So what is string when ABC and what is a string to let's call it D.



304

00:21:56,310 --> 00:22:03,070

If so what you will do you will take one point here and you will just I don't know what this string



305

00:22:03,550 --> 00:22:05,510

so you will do something like this.



306

00:22:05,590 --> 00:22:11,950

What is string so it is distinguished so string when I get corrected it is nothing it is just equal



307

00:22:11,950 --> 00:22:14,490

to string to I get corrected.



308

00:22:14,980 --> 00:22:20,830

So I am trying to copy the content of string to interesting Gwen so you will just irate over the string



309

00:22:20,830 --> 00:22:23,430

too and you will copy the content.



310

00:22:23,650 --> 00:22:28,720

So just remember you have to also copy the null corrected so they will get copied.



311

00:22:28,750 --> 00:22:29,950

Then even get copied.



312

00:22:29,980 --> 00:22:33,100

Then F will get copied and then corrected will get copied.



313

00:22:33,100 --> 00:22:36,270

Simple very simple.



314

00:22:36,330 --> 00:22:38,650

So your for loop what it will look like this.



315

00:22:38,850 --> 00:22:43,800

You are trying to hide data with a string too so you will write like this equals zero i.e. less than



316

00:22:43,830 --> 00:22:47,000

I did close to N and I bless bless.



317

00:22:47,010 --> 00:22:52,390

So remember that inbuilt string copy function it copy the note corrected also.



318

00:22:52,390 --> 00:22:55,730

So you have to copy the null connector that's way less than articles 2.



319

00:22:55,750 --> 00:23:06,180

So what is n and this string lint off string to so you can definitely implement this code by yourself.



320

00:23:06,220 --> 00:23:08,400

I am living this task to you.



321

00:23:08,830 --> 00:23:12,250

So we have seen t functions till now.



322

00:23:12,310 --> 00:23:13,810

So first one was the Lent function.



323

00:23:13,810 --> 00:23:19,540

Second is compared to string function and the third one is actually copy strings hosting copy function.



324

00:23:19,540 --> 00:23:28,550

Now let's see the fourth function so the fourth function is string and copy.



325

00:23:28,830 --> 00:23:31,160

You want to copy the first and correct us.



326

00:23:31,230 --> 00:23:37,170

So this is basically you want to copy these first and corrected off one string and do another string



327

00:23:37,200 --> 00:23:40,070

so copy first and correct us.



328

00:23:40,080 --> 00:23:41,760

So in the above function so what.



329

00:23:41,760 --> 00:23:49,230

String copy will do string copy it will take to string string when answering to and it will copy the



330

00:23:49,230 --> 00:23:53,990

whole string to undo string one and string do will not be affected.



331

00:23:54,030 --> 00:24:01,410

So this this string copy function it copied the whole string but string and copy will copy only the



332

00:24:01,410 --> 00:24:02,820

first and correct both.



333

00:24:02,850 --> 00:24:04,620

So this is not copy this is the character.



334

00:24:04,950 --> 00:24:08,980

So it will only copy these first and characters simple.



335

00:24:09,030 --> 00:24:13,570

So for example my string Len is okay.



336

00:24:13,580 --> 00:24:14,650

So what do we this index.



337

00:24:14,660 --> 00:24:23,470

So you will write like this string and copy you will give the destination string then you will give



338

00:24:23,500 --> 00:24:31,600

the source string and then you will give how many characters you want to copy first and correct this



339

00:24:31,600 --> 00:24:32,770

will get copied.



340

00:24:32,770 --> 00:24:40,840

For example if a string one is a b c d e and let us handle and what is your string to so the string



341

00:24:40,840 --> 00:24:44,440

to is let's say hello and then obviously then.



342

00:24:44,760 --> 00:24:48,390

So what will happen if I call the function string and copy.



343

00:24:48,390 --> 00:24:55,710

I will give a string when I will give string to and let's say I want to copy first three characters.



344

00:24:55,720 --> 00:25:02,470

So h e l will get copied so we remove these t characters and h e l will come here.



345

00:25:02,470 --> 00:25:10,840

Now one thing to notice here is string and copy it will not copy the initial character so it will not



346

00:25:10,840 --> 00:25:12,340

copy null character.



347

00:25:12,370 --> 00:25:18,100

So no character is not going to be copied whereas string copy function it will copy these null character



348

00:25:18,640 --> 00:25:20,430

so it copies Dean and characters.



349

00:25:21,250 --> 00:25:25,490

So that is the basic basic difference between string copy and string and copy.



350

00:25:25,540 --> 00:25:31,690

Again do not take my words we will write the code so let's make it.



351

00:25:31,900 --> 00:25:44,850

Hello and instead of a strict copy function so I will call the function string and copy C.P. VI.



352

00:25:45,030 --> 00:25:48,020

This is a string when then string do.



353

00:25:48,060 --> 00:25:52,670

And I want to copy first three characters so let's see



354

00:25:56,870 --> 00:26:00,460

so my string when was initially a b c d and string two was yellow.



355

00:26:00,500 --> 00:26:04,720

Now after copying string one becomes edgy early and distinct to his Hello.



356

00:26:04,730 --> 00:26:05,840

So why actually.



357

00:26:05,870 --> 00:26:10,230

So it is very obvious so string one was ABC.



358

00:26:10,290 --> 00:26:12,090

So this was the initial condition.



359

00:26:12,270 --> 00:26:15,110

Then you are copying the first three characters of string two.



360

00:26:15,120 --> 00:26:23,280

So what are the first three characters h e and so h e n so h e l so let's say the string one will become



361

00:26:23,310 --> 00:26:24,780

edgy in and then the.



362

00:26:24,780 --> 00:26:26,400

And obviously you have the character.



363

00:26:26,520 --> 00:26:32,600

So again the string and copy function it will not copy the name but simple.



364

00:26:32,670 --> 00:26:39,570

Now one note that you might be having in your mind is basically let's say if my first string is basically



365

00:26:40,050 --> 00:26:50,450

so for example if my first string is actually a b c d and let's say my second string is actually x ray



366

00:26:50,450 --> 00:26:57,860

only and if I call the function this one string and copy if I'm calling the function string and copy.



367

00:26:57,860 --> 00:27:06,300

So copy the content of string to interesting one and copy these first four characters but if you will



368

00:27:06,300 --> 00:27:09,510

see string to only has to correct those.



369

00:27:09,510 --> 00:27:11,310

So what will happen.



370

00:27:11,730 --> 00:27:13,370

Again it is very obvious again.



371

00:27:13,440 --> 00:27:16,180

So first two characters will get copied.



372

00:27:16,470 --> 00:27:22,290

So X will come in and virally come here but see we have to copy the four character first for character



373

00:27:22,710 --> 00:27:28,560

and obviously we have only two characters so what will happen at least two characters will become null.



374

00:27:28,590 --> 00:27:34,620

So the first two characters will get corporate X Y and the next two characters will automatically will



375

00:27:34,800 --> 00:27:38,370

be copied the next two characters that will get copied will be null.



376

00:27:38,370 --> 00:27:46,080

So instead of CMB MacLennan socially tried to print a string when the output will be excellent.



377

00:27:46,530 --> 00:27:47,220

So let's see



378

00:27:51,940 --> 00:27:59,150

so instead of yellow let's make it X X1 and as discussed the output will be.



379

00:27:59,220 --> 00:28:04,530

So I want to copy the first four characters and the string two is containing only two characters.



380

00:28:04,530 --> 00:28:10,410

So first two connect doesn't get copied X Y and the next two characters that are going to be get copied



381

00:28:10,410 --> 00:28:12,410

and actually then corrected.



382

00:28:13,020 --> 00:28:15,650

So you can see string one is X way.



383

00:28:15,780 --> 00:28:17,580

Initially it was ABC.



384

00:28:17,610 --> 00:28:19,320

So that's how it will work.



385

00:28:21,760 --> 00:28:24,340

So now let's see the lost function.



386

00:28:24,430 --> 00:28:27,880

So we have done Ford and function and are titles.



387

00:28:27,880 --> 00:28:32,520

So the first function was SDR alien.



388

00:28:32,690 --> 00:28:40,870

The second function was I think string compare and so SDL RCMP the third function was string copy as



389

00:28:40,870 --> 00:28:49,320

DCP VI and therefore its function was string and copy and now let us see the last function.



390

00:28:49,320 --> 00:28:58,220

So this is very simple string concatenate so string concatenate function but it will lose so this string



391

00:28:58,220 --> 00:29:01,100

concatenate function it will be boosting as input.



392

00:29:01,100 --> 00:29:09,050

So this is string one and this is string to so it will concatenate the content of a string to after



393

00:29:09,050 --> 00:29:09,620

string one.



394

00:29:09,620 --> 00:29:19,470

So for example if my string one is let's say ABC and if my string too is let's say the F and if you



395

00:29:19,480 --> 00:29:24,100

call this function string concatenate so string two will get appended after string 1.



396

00:29:24,220 --> 00:29:26,020

So basically leave it to the situation.



397

00:29:26,260 --> 00:29:35,930

So a string one will become C D E F so B if we get copied at the end and string two will remain same.



398

00:29:36,130 --> 00:29:38,880

Obviously we are not doing anything with string two.



399

00:29:38,990 --> 00:29:43,990

So obviously do not take my word I will just write the code and we will see it ourself



400

00:29:46,730 --> 00:29:50,360

so let's not use this function anymore.



401

00:29:51,910 --> 00:29:52,210

Okay.



402

00:29:52,220 --> 00:29:57,790

So what I want to do string concatenate so before concatenate so you NCT.



403

00:29:57,830 --> 00:30:06,580

So before one congregation and after concatenation and let us call the function string concatenate I



404

00:30:06,580 --> 00:30:13,720

will pass string one and I will pass this thing too to so copy the content of so concatenate the content



405

00:30:13,720 --> 00:30:16,670

of string to after the string when simple.



406

00:30:16,690 --> 00:30:19,420

So let's do let's run our program



407

00:30:23,480 --> 00:30:25,960

so you can see string do is remaining same.



408

00:30:25,970 --> 00:30:26,590

No changes.



409

00:30:26,600 --> 00:30:28,480

But initially the string one was a b c d.



410

00:30:28,490 --> 00:30:29,720

Now it is ABC.



411

00:30:29,750 --> 00:30:30,230

Excellent.



412

00:30:30,980 --> 00:30:37,420

So this is a b c d x y because a string 2 is now concatenated at the end of distinguished string to



413

00:30:37,430 --> 00:30:40,340

is appended at the end of string 1.



414

00:30:40,600 --> 00:30:44,000

So can you implement this string concatenated function yourself.



415

00:30:45,230 --> 00:30:47,530

Yes definitely we can merge.



416

00:30:47,540 --> 00:30:50,580

Do you have to do you just have to do basic basic thing.



417

00:30:50,600 --> 00:30:57,740

So for example this is your string when you would lose all the ABC and then you have none.



418

00:30:57,900 --> 00:31:02,970

And what is string to string do is actually the F and then you have nil.



419

00:31:03,510 --> 00:31:04,260

So what do we do.



420

00:31:04,290 --> 00:31:06,460

You will come at this point.



421

00:31:06,620 --> 00:31:10,270

So what is this point so you can take a variable let's quality.



422

00:31:10,490 --> 00:31:11,330

So what is I.



423

00:31:11,360 --> 00:31:14,350

I use nothing but string land.



424

00:31:14,510 --> 00:31:16,310

You can call the functions to England.



425

00:31:16,310 --> 00:31:19,890

You will pass a string when so will likely come at this point.



426

00:31:19,900 --> 00:31:22,610

So after coming at this point what do you will do.



427

00:31:22,610 --> 00:31:28,040

You will copy discontent dual irate with this eddy and you will copy the content so for example you



428

00:31:28,040 --> 00:31:30,290

will write like this string.



429

00:31:30,290 --> 00:31:35,430

When let's call it.



430

00:31:35,620 --> 00:31:38,140

So what I will do I will create a listing too.



431

00:31:38,200 --> 00:31:41,520

So let's call it i.e. basically.



432

00:31:41,920 --> 00:31:43,700

And let's call it.



433

00:31:43,840 --> 00:31:45,130

And so this is.



434

00:31:45,140 --> 00:31:47,520

And so what I will do I would write like this.



435

00:31:47,560 --> 00:31:59,900

String 1 8 plus n is it close to string to 8 character and obviously you add I.



436

00:32:00,280 --> 00:32:01,750

You have to copy that also.



437

00:32:01,750 --> 00:32:09,380

Okay so it will become D then E then F and then you will copy dissonant so I equals zero I less denied



438

00:32:09,390 --> 00:32:12,410

equals to so let's.



439

00:32:12,770 --> 00:32:14,180

What is the length of this string.



440

00:32:14,180 --> 00:32:17,210

So let's store it in a variable M so you will write like this.



441

00:32:17,210 --> 00:32:21,830

String length of string do you have to copy the nettle correctly also.



442

00:32:22,260 --> 00:32:24,010

So you can write like this.



443

00:32:24,150 --> 00:32:25,530

This is m.



444

00:32:25,760 --> 00:32:28,740

This is him and you will do a plus plus.



445

00:32:28,820 --> 00:32:37,740

And that's on so I think this code should work fine how it will work because you can see what they are



446

00:32:37,740 --> 00:32:38,000

doing.



447

00:32:38,000 --> 00:32:44,070

You are trading on instinct too and you have to copy the entire content of string 2 so I equals zero.



448

00:32:44,130 --> 00:32:46,130

I left an article stream I plus plus.



449

00:32:46,340 --> 00:32:51,750

So we will take this for variables and to consider it for characters into consideration.



450

00:32:51,750 --> 00:32:59,770

D E F and then and here what I am doing for string when so I am doing a plus and so I if the value of



451

00:32:59,770 --> 00:33:02,130

FY 0 you are doing I listen.



452

00:33:02,160 --> 00:33:05,900

So if you will if you will add plus 1 you will reach here.



453

00:33:06,240 --> 00:33:11,260

So B will get copied in place often and so that's how it will work.



454

00:33:11,280 --> 00:33:15,030

Or D will come here even come here and F will come here okay.



455

00:33:15,040 --> 00:33:17,300

So I think this goal should work.



456

00:33:17,320 --> 00:33:18,070

So what do you have to do.



457

00:33:18,070 --> 00:33:24,710

You have to implement all these five functions yourself so just write the implementation of all the



458

00:33:24,710 --> 00:33:31,270

five functions and from my experience I can tell you which functions are most important.



459

00:33:31,270 --> 00:33:38,030

This one only this one and you can very easily implement this function.



460

00:33:38,050 --> 00:33:41,760

We have also implemented this one string copy yes.



461

00:33:41,770 --> 00:33:48,390

This is also sometimes useful but mostly I use only these two functions string length and string copy.



462

00:33:50,070 --> 00:33:52,670

These two functions are very rarely used.



463

00:33:52,860 --> 00:33:54,150

And similarly this one also.



464

00:33:55,440 --> 00:33:59,170

So this one and this one are the most important.



465

00:33:59,310 --> 00:34:05,680

So we have already implemented this one and we have also implemented this one.



466

00:34:05,880 --> 00:34:07,590

I think you can implement the rest.



467

00:34:07,590 --> 00:34:12,840

Three of them so this will be a very good according exercise for you.



468

00:34:12,840 --> 00:34:15,460

I hope you guys can definitely do it.



469

00:34:15,720 --> 00:34:16,970

So we'll see in the next one.



470

00:34:16,980 --> 00:34:17,310

Bye bye.