1

00:00:01,720 --> 00:00:02,380

Hi everyone.



2

00:00:02,380 --> 00:00:06,210

So in this video we are going to learn about civilization.



3

00:00:06,460 --> 00:00:12,850

So what is civilization to civilization is a process of storing and driving the state of an object.



4

00:00:12,890 --> 00:00:16,270

I know the definition is very weird and it is tough to understand.



5

00:00:16,270 --> 00:00:19,540

But first let us write the code and then we will understand with the help of code.



6

00:00:20,230 --> 00:00:22,320

So this is my final situation not CBB.



7

00:00:22,320 --> 00:00:25,750

Now what I'm going to do so obviously I have to include the File f stream



8

00:00:29,180 --> 00:00:31,810

so first let us create a class.



9

00:00:32,000 --> 00:00:37,620

Suppose I want to create a class a student and what I want private properties.



10

00:00:37,700 --> 00:00:42,920

So let's say I want to take three private properties so first is what is the name of the student.



11

00:00:43,340 --> 00:00:45,980

Second is what is the rule number of the student.



12

00:00:45,980 --> 00:00:51,300

And third is basically what is the branch of the student.



13

00:00:51,360 --> 00:00:53,210

And now let us create a constructor



14

00:00:57,340 --> 00:01:00,720

so the student what it will take it will take.



15

00:01:00,720 --> 00:01:02,410

What is the name of the student.



16

00:01:02,410 --> 00:01:07,300

It will take the total number of the student and it will take the branch of the student.



17

00:01:07,360 --> 00:01:08,680

So this is string branch.



18

00:01:08,740 --> 00:01:11,950

Saudi now after doing this.



19

00:01:11,960 --> 00:01:15,050

Let us do so what is my name.



20

00:01:15,050 --> 00:01:21,770

Name is an it is and actually what is the rule number.



21

00:01:22,680 --> 00:01:29,800

So it is odd and the branches be.



22

00:01:29,810 --> 00:01:34,870

So what I want to do so it does create an object first.



23

00:01:34,880 --> 00:01:45,230

So student as one so let's say the name is Doc so rule number is let's say today and the branches let's



24

00:01:45,230 --> 00:01:48,890

say CAC simple.



25

00:01:48,890 --> 00:01:50,960

Now I want to store this object.



26

00:01:50,960 --> 00:01:53,990

So basically I want to store the data in a fine.



27

00:01:54,020 --> 00:01:58,010

So basically I have to use output stream.



28

00:01:58,070 --> 00:02:00,170

Let's say the name of the object is all office.



29

00:02:00,170 --> 00:02:02,340

I want to create a file.



30

00:02:02,490 --> 00:02:11,050

Student dot the 60 and let's say I want to get whatever is present in that fight.



31

00:02:11,090 --> 00:02:15,300

So if you will see basically this is our file folder.



32

00:02:15,350 --> 00:02:16,520

So this is.



33

00:02:16,520 --> 00:02:22,430

So this is and predictably so there is no need to truncate because it will create a new file student



34

00:02:22,500 --> 00:02:24,520

or the extra file will be created.



35

00:02:24,570 --> 00:02:30,300

Now if I want to stored this object store object S1 would I have to do so I have to do something like



36

00:02:30,300 --> 00:02:35,180

this or office s or not name stored.



37

00:02:35,180 --> 00:02:41,120

Name then you have to do something like this or if this is to dot.



38

00:02:41,290 --> 00:02:41,950

So it is.



39

00:02:41,950 --> 00:02:42,490

Rule number.



40

00:02:42,490 --> 00:02:54,160

So this is really no and then you will do well if S S T sorry this is S1 actually S1 and then you will



41

00:02:54,160 --> 00:02:57,830

do all of this S1 and art branch



42

00:03:01,660 --> 00:03:09,430

and finally you will do or if it's not close if I want to store the data in a store not the extra fine



43

00:03:09,880 --> 00:03:15,480

I have to do this but this is very cumbersome process I have to write many lines of code.



44

00:03:15,490 --> 00:03:20,080

So what I want to do so I want that if I will write or if s



45

00:03:22,900 --> 00:03:26,670

s1 so I want to do something like this.



46

00:03:26,710 --> 00:03:27,770

So this line should work.



47

00:03:27,820 --> 00:03:29,730

It should write name.



48

00:03:29,980 --> 00:03:36,850

It should write or number and this line should write the branch inside the file to then dot the 60.



49

00:03:36,850 --> 00:03:40,240

So I want this line to work and it is very obvious.



50

00:03:40,300 --> 00:03:47,710

So for this line to look what we have to do we have to overload this operator we have to overload this



51

00:03:47,710 --> 00:03:55,480

operators on this overload this operator so for overloading the operator what I have to do.



52

00:03:55,480 --> 00:04:00,730

So first of all what is the operator get when we want to overload.



53

00:04:00,780 --> 00:04:05,560

So we want to overload this operator so.



54

00:04:05,620 --> 00:04:08,140

This one I want to overload this operator.



55

00:04:09,550 --> 00:04:18,170

So what it will take it will take an object off f stream glass output file stream glass biodefense let's



56

00:04:18,490 --> 00:04:22,960

say the name is or this it will also take a Student object



57

00:04:27,720 --> 00:04:31,290

biodefense Student object biodefense.



58

00:04:31,290 --> 00:04:33,490

Let's say the name is s.



59

00:04:33,750 --> 00:04:36,580

So you have to write friend in front of it friend.



60

00:04:36,630 --> 00:04:37,980

And what do you write it.



61

00:04:38,050 --> 00:04:43,760

What I will write and so I will have done an object of output file a stream class.



62

00:04:43,770 --> 00:04:48,410

So I want to return an object of our proposed stream class biodefense.



63

00:04:48,540 --> 00:04:53,250

So I want to write an object of this class biodefense so this is written by reference and I am taking



64

00:04:53,250 --> 00:04:57,530

input biodefense so what I have to do.



65

00:04:58,680 --> 00:05:09,090

So basically what I will do I will do all this work inside this function.



66

00:05:09,140 --> 00:05:10,640

So basically I am storing the name.



67

00:05:10,640 --> 00:05:17,180

So here the object the other name of the student is s so I will make it s I am storing the name I am



68

00:05:17,180 --> 00:05:19,340

storing the whole number and I am studying the branch.



69

00:05:19,400 --> 00:05:26,740

And finally I have to return the object biodefense so I will return with this.



70

00:05:26,780 --> 00:05:29,460

So this is all that we have to do now if you will write here.



71

00:05:30,560 --> 00:05:36,290

So if I will write or if this is one to the name of the student is S one.



72

00:05:36,290 --> 00:05:40,220

So if you write or if it's S1 So what will happen.



73

00:05:40,220 --> 00:05:45,510

This piece of code will get executed and our name rule number and branch will get stored.



74

00:05:45,590 --> 00:05:47,080

So this is how it will look.



75

00:05:47,090 --> 00:05:48,440

So let us start program



76

00:05:54,080 --> 00:05:55,300

so we are not printing anything.



77

00:05:55,300 --> 00:05:57,460

That's why our screen is empty.



78

00:05:57,590 --> 00:05:58,880

Now let's see this four letter again.



79

00:05:59,330 --> 00:06:04,540

So I have this student file that does open this flight landed here we have a block party and CSC.



80

00:06:05,510 --> 00:06:07,720

So this is very important concept.



81

00:06:07,730 --> 00:06:11,070

What we are doing so just writing.



82

00:06:11,120 --> 00:06:16,460

We just overloaded this operated and we can do this.



83

00:06:16,550 --> 00:06:20,160

So all this work is basically done inside the class.



84

00:06:20,870 --> 00:06:28,670

And now what I mean is looking very very simple subdomain becomes very simple you can see.



85

00:06:28,750 --> 00:06:32,250

So this is our I mean we are just creating an object.



86

00:06:32,470 --> 00:06:36,790

Then I want to open this file this render the extra file then I am able to do this.



87

00:06:36,790 --> 00:06:38,530

So this is very powerful.



88

00:06:38,560 --> 00:06:41,340

Now similarly I want to read the file.



89

00:06:41,530 --> 00:06:43,970

So for reading the file what I want to do.



90

00:06:43,990 --> 00:06:49,650

So I want to do something like this IFRS S1 again.



91

00:06:49,650 --> 00:06:51,980

So if you want to do this what do we have to do.



92

00:06:52,050 --> 00:06:53,710

So you will overload this operator.



93

00:06:54,840 --> 00:06:58,390

So just like we overloaded this operator we will overload this operator also.



94

00:06:59,070 --> 00:07:02,960

So let us write the code.



95

00:07:03,420 --> 00:07:10,490

So what I want to do I want to create a student let's say S2 then I want to do something like this.



96

00:07:10,500 --> 00:07:13,250

So basically I have to create an object first.



97

00:07:13,380 --> 00:07:21,940

So input file stream let's say the name of the object is a office and I want to read this file student



98

00:07:22,380 --> 00:07:28,150

not the 60 I want to read its content then I want to do something like this.



99

00:07:28,170 --> 00:07:35,350

I f s student as to okay.



100

00:07:35,360 --> 00:07:36,650

So I want to do like this.



101

00:07:36,710 --> 00:07:41,340

I first wrote it s true and then basically what I will do I will print the content where this present



102

00:07:41,380 --> 00:07:42,540

inside is true.



103

00:07:42,590 --> 00:07:46,960

So basically I will do something like this as to dart name



104

00:07:55,850 --> 00:08:01,250

then I will print you limit so Astronaut William



105

00:08:05,220 --> 00:08:07,380

and then what I want to do.



106

00:08:07,380 --> 00:08:11,080

So I also want to print what is the branch



107

00:08:16,700 --> 00:08:23,500

so astronaut bench Okay so I want to do something like this.



108

00:08:23,510 --> 00:08:25,410

ISIS is too.



109

00:08:25,520 --> 00:08:26,540

So again what do we do.



110

00:08:26,540 --> 00:08:28,400

We will overload this operator.



111

00:08:29,030 --> 00:08:30,770

So let's just copy this called



112

00:08:36,740 --> 00:08:40,690

so this time I want to return an object of input file stream biodefense.



113

00:08:41,060 --> 00:08:44,330

I want to overload this operator.



114

00:08:44,330 --> 00:08:47,060

So this is in file stream object.



115

00:08:47,060 --> 00:08:54,140

The name is Isis and I have to pass distributed by defense so that the changes will get reflected here.



116

00:08:54,150 --> 00:08:58,200

Now what I have to do so instead of office I will write a office.



117

00:08:58,230 --> 00:08:59,610

Similarly I office here.



118

00:09:00,180 --> 00:09:01,400

Similarly AFSC



119

00:09:12,670 --> 00:09:13,390

and similarly



120

00:09:20,550 --> 00:09:26,000

so obviously we have to change the operator also take input



121

00:09:28,690 --> 00:09:31,850

and finally what I will do so I will return ISIS.



122

00:09:31,870 --> 00:09:35,530

So this is exactly the same code just like this one.



123

00:09:35,950 --> 00:09:37,680

Here we are writing the data to the file.



124

00:09:37,700 --> 00:09:40,620

And here we are reading the data from the file.



125

00:09:40,630 --> 00:09:42,790

So finally I am returning ISIS.



126

00:09:42,880 --> 00:09:43,900

So here what I am doing.



127

00:09:43,900 --> 00:09:49,030

So this the data that we are reading that will stored that will be stored in this trial and I am printing



128

00:09:49,030 --> 00:09:52,020

the name and printing the rule number and I am printing the branch.



129

00:09:52,870 --> 00:09:57,340

Okay so let us run our program so first of all what will happen.



130

00:09:57,340 --> 00:10:04,420

So this file is already containing this data but we do not need to worry because if you will in this



131

00:10:04,420 --> 00:10:05,350

program what will happen.



132

00:10:05,350 --> 00:10:06,770

So this is with us.



133

00:10:06,790 --> 00:10:10,930

So by default it is by default it is truncate.



134

00:10:10,990 --> 00:10:11,730

So what will happen.



135

00:10:11,740 --> 00:10:17,940

It will delete the old content and it will again stored these values.



136

00:10:17,950 --> 00:10:21,100

So if we do not have to worry and then we are creating this object.



137

00:10:21,190 --> 00:10:25,680

So it will contain all these values and we are printing all these values.



138

00:10:25,900 --> 00:10:26,870

And one more thing.



139

00:10:26,890 --> 00:10:29,630

So after doing the work I have to also close the file.



140

00:10:29,800 --> 00:10:32,510

So I if it's not close.



141

00:10:33,220 --> 00:10:36,370

So let us write our program okay.



142

00:10:36,390 --> 00:10:42,100

So we are getting at this line because you can see so we have written the betterment based construct



143

00:10:42,120 --> 00:10:44,790

benzo a default constructor does not exist.



144

00:10:44,860 --> 00:10:54,100

So that's why we have to create a default constructor so this is a default constructor so it will not



145

00:10:54,100 --> 00:11:03,500

contain anything it is empty just empty so in order to run our program so we are getting error because



146

00:11:03,600 --> 00:11:07,390

he had the name rule number and Valentine actually private.



147

00:11:07,390 --> 00:11:10,760

So we have to make them public if we want to access all these things here.



148

00:11:11,250 --> 00:11:18,590

So when it does make them public so now I think everything should work fine.



149

00:11:18,590 --> 00:11:28,050

So let us turn our program and let's see so you can see the name is Brock the all lambast 30 and the



150

00:11:28,050 --> 00:11:31,410

branches CSC and if you will see the file.



151

00:11:31,640 --> 00:11:35,090

So the file is again containing the same content.



152

00:11:35,150 --> 00:11:37,910

What will happen to first discontent will be deleted.



153

00:11:37,910 --> 00:11:39,680

And again I am writing discontent.



154

00:11:40,370 --> 00:11:43,400

OK so that's how everything is working



155

00:11:47,170 --> 00:11:53,890

so you can see with the help of civilization the code that should belong to the class as belonging to



156

00:11:53,890 --> 00:11:54,540

class now.



157

00:11:55,510 --> 00:12:01,930

So now you can see what I mean has become so much simpler and we are just doing a little book inside



158

00:12:01,930 --> 00:12:09,160

our main function and we are able to achieve this with the help of overloading these two operators.



159

00:12:09,250 --> 00:12:12,910

This an operator and this operator.



160

00:12:13,050 --> 00:12:14,210

So this is the computer code.



161

00:12:14,220 --> 00:12:16,050

If you have any doubt and civilization.



162

00:12:16,080 --> 00:12:17,350

You can definitely ask me.



163

00:12:17,400 --> 00:12:18,670

I will see you in the next one.



164

00:12:18,680 --> 00:12:19,050

Bye bye.