1 00:00:02,700 --> 00:00:04,700 Hello, everyone, and welcome back to the cause. 2 00:00:05,250 --> 00:00:09,030 So I hope all of you got to play with a little bit of C++. 3 00:00:09,510 --> 00:00:12,210 We have not done anything special in our last program. 4 00:00:12,630 --> 00:00:16,050 We just made a program that was printing something out to the user. 5 00:00:17,460 --> 00:00:20,670 So today in this video, we just do a very small problem. 6 00:00:21,030 --> 00:00:25,020 We will try to do something a little more interesting than what we did last time. 7 00:00:25,830 --> 00:00:27,630 But again, very, very simple problem. 8 00:00:28,140 --> 00:00:34,480 So what do you want to do is we want to take two numbers, add them up and give it out to the user. 9 00:00:35,310 --> 00:00:35,640 OK. 10 00:00:36,300 --> 00:00:36,480 OK. 11 00:00:36,540 --> 00:00:37,530 So nothing special. 12 00:00:37,950 --> 00:00:42,300 We will simply take two numbers, add them and we'll give our producer. 13 00:00:42,720 --> 00:00:43,320 That's it. 14 00:00:43,820 --> 00:00:44,120 OK. 15 00:00:44,670 --> 00:00:45,930 Let's get started on that. 16 00:00:51,290 --> 00:00:58,040 OK, so first of all, let us create a new file file, new and then empty file. 17 00:01:00,440 --> 00:01:01,280 Save file. 18 00:01:08,340 --> 00:01:10,820 Add to a number. 19 00:01:15,350 --> 00:01:17,390 And then dart CBP. 20 00:01:19,290 --> 00:01:19,610 Si. 21 00:01:20,730 --> 00:01:22,290 Okay, so let us write some code. 22 00:01:26,400 --> 00:01:27,140 Hash included. 23 00:01:27,410 --> 00:01:28,200 I will stream 24 00:01:31,080 --> 00:01:36,240 using using namespace SDD semicolon 25 00:01:38,910 --> 00:01:39,540 and main. 26 00:01:43,490 --> 00:01:47,780 And then I'm having it done zero. 27 00:01:49,090 --> 00:01:49,370 OK. 28 00:01:49,910 --> 00:01:50,870 So just a second. 29 00:01:59,370 --> 00:02:07,740 OK, so let's say my first number is 10, so I equals then and my second number is 15. 30 00:02:07,980 --> 00:02:10,680 So G equals fifteen. 31 00:02:11,900 --> 00:02:13,640 Don't forget to write him a column. 32 00:02:18,170 --> 00:02:20,060 So basically, what do you want here? 33 00:02:20,810 --> 00:02:24,770 I want the system to give me some memory in which I can store my data. 34 00:02:25,580 --> 00:02:28,100 So first of all, I will get some memory. 35 00:02:28,370 --> 00:02:29,690 I will store some detail in it. 36 00:02:30,050 --> 00:02:32,870 And after some time, I will have to assess the data. 37 00:02:33,530 --> 00:02:37,040 So we call this storage, this data variables. 38 00:02:39,980 --> 00:02:41,300 So what do we want? 39 00:02:44,840 --> 00:02:46,850 We basically need some space. 40 00:02:47,630 --> 00:02:50,180 We want the system to give us some space. 41 00:02:51,050 --> 00:02:52,520 We want to name it something. 42 00:02:52,940 --> 00:02:55,140 And we want to put some data inside it. 43 00:02:56,180 --> 00:02:57,410 Why do we want to name it? 44 00:02:58,100 --> 00:03:03,020 We want to name it so that later on when I want to assess the data, I have a way to do that. 45 00:03:04,730 --> 00:03:05,890 Okay, so let's see. 46 00:03:08,260 --> 00:03:09,030 Blandon. 47 00:03:13,680 --> 00:03:15,300 OK, so there is an added. 48 00:03:16,580 --> 00:03:18,440 And we can read their statement here. 49 00:03:18,770 --> 00:03:20,890 I was not declared in this court. 50 00:03:21,950 --> 00:03:25,670 This basically means my compiler doesn't know what is a. 51 00:03:27,240 --> 00:03:31,120 OK, so why this ad is coming and how we can resolve it. 52 00:03:36,980 --> 00:03:40,060 OK, see if I want to store some data in my brain. 53 00:03:40,570 --> 00:03:42,010 I have to do nothing special. 54 00:03:42,730 --> 00:03:45,430 I just need to say, hey, please do then. 55 00:03:45,970 --> 00:03:47,920 And it will restore somewhere in my brain. 56 00:03:48,880 --> 00:03:52,660 Similarly, a store fifteen, and it'll be stored somewhere. 57 00:03:53,260 --> 00:03:56,950 But to store data in a computer winterlude, something extra. 58 00:03:58,140 --> 00:04:01,290 OK, so let's see what extra work we have to do. 59 00:04:02,370 --> 00:04:06,900 So for storing retain our computer, we have to tell two more things. 60 00:04:15,850 --> 00:04:25,060 What do you want to store and how much space you want fostering or draw down and this problem? 61 00:04:26,800 --> 00:04:28,360 I want to store in deejay's. 62 00:04:32,520 --> 00:04:37,170 And now I have to tell one more thing, how big and tedious you understood. 63 00:04:38,970 --> 00:04:41,860 Do we want to store hundred or let's say a thousand? 64 00:04:42,350 --> 00:04:45,200 So these are very small numbers. 65 00:04:45,620 --> 00:04:45,860 OK. 66 00:04:45,950 --> 00:04:48,140 So under 10000 are these poll numbers. 67 00:04:48,500 --> 00:04:50,090 They require very less space. 68 00:04:51,080 --> 00:04:58,310 But what if if you want to store a big number, for example, one, two, three, four, five, six, 69 00:04:58,370 --> 00:05:01,820 seven, eight, nine, one one, one, two, three, four. 70 00:05:02,390 --> 00:05:07,220 So this is a very big number and it requires a lot of space. 71 00:05:07,850 --> 00:05:10,580 So we have to tell our system how much space we want. 72 00:05:11,210 --> 00:05:16,270 We want to buy it all we want for bite it, bite 16 bites. 73 00:05:16,520 --> 00:05:16,830 OK. 74 00:05:17,240 --> 00:05:18,530 So we have to two things. 75 00:05:18,920 --> 00:05:23,570 What do they want to store and how much space you want for storing your data? 76 00:05:25,880 --> 00:05:32,870 So in this case, I want to stay in business and I want to store decent size integers, my integers 77 00:05:32,900 --> 00:05:35,590 will not be too large and it will not be too small. 78 00:05:40,220 --> 00:05:42,260 OK, so we need to right here. 79 00:05:42,370 --> 00:05:42,680 And. 80 00:05:49,970 --> 00:05:50,840 And similarly. 81 00:05:53,100 --> 00:05:53,640 Indigene. 82 00:05:59,330 --> 00:06:02,090 So in Dimmeys, indigent. 83 00:06:04,480 --> 00:06:07,660 And in desert data type our first due to diapers. 84 00:06:08,350 --> 00:06:16,780 And so I did a tape tells us two things what data you are storing and how much space you want for storing 85 00:06:16,780 --> 00:06:17,310 that data. 86 00:06:18,780 --> 00:06:23,070 So in this problem, I want to store in Tejas. 87 00:06:25,600 --> 00:06:28,300 And my teachers will be of four bytes. 88 00:06:31,080 --> 00:06:34,070 But how big in pages begins drawing for Bite's? 89 00:06:35,370 --> 00:06:37,290 We will discuss it in upcoming we do's. 90 00:06:39,590 --> 00:06:41,300 OK, so let's solve this problem. 91 00:06:43,990 --> 00:06:48,040 So I need one more variable, let's say the name of the variable is key. 92 00:06:48,460 --> 00:06:50,070 And what is there a low key? 93 00:06:50,740 --> 00:06:51,820 I plus G. 94 00:06:53,080 --> 00:06:54,320 I bless G. 95 00:06:56,080 --> 00:06:57,910 And then what will I do? 96 00:06:57,970 --> 00:07:01,630 I will bring Turkey because my answer is invariable. 97 00:07:02,620 --> 00:07:04,700 So we'll see our turkey and then semicolon. 98 00:07:05,540 --> 00:07:05,730 OK. 99 00:07:05,800 --> 00:07:07,180 So virtually my answer. 100 00:07:07,300 --> 00:07:09,630 My answer should be 25. 101 00:07:10,270 --> 00:07:11,200 So, Ballenden. 102 00:07:14,710 --> 00:07:16,540 And my answer is twenty five. 103 00:07:17,370 --> 00:07:17,590 OK. 104 00:07:20,830 --> 00:07:23,390 OK, so what if I want to change my life, if I. 105 00:07:24,250 --> 00:07:25,540 So we can easily do that? 106 00:07:25,960 --> 00:07:27,270 I will simply write I. 107 00:07:27,710 --> 00:07:28,810 It calls Hardeen. 108 00:07:28,960 --> 00:07:31,390 For example, the new radio of I is putting. 109 00:07:32,110 --> 00:07:33,900 There is no need of writing intention. 110 00:07:37,530 --> 00:07:38,950 OK, so what is happening? 111 00:07:40,380 --> 00:07:43,970 My aim was to change the value of I, so I will simply write. 112 00:07:44,070 --> 00:07:44,890 I was 13. 113 00:07:45,290 --> 00:07:47,280 There is no need of writing in indigene. 114 00:07:48,670 --> 00:07:49,940 And what is happening here? 115 00:07:51,370 --> 00:07:53,140 I have my memory for bite's. 116 00:07:55,390 --> 00:07:57,690 The name of this memories, eh? 117 00:07:58,060 --> 00:07:59,590 And here I am having an. 118 00:08:01,020 --> 00:08:02,800 OK, so what this state run will do? 119 00:08:03,480 --> 00:08:04,970 It was simply right, Hardeen here. 120 00:08:05,830 --> 00:08:06,120 OK. 121 00:08:07,110 --> 00:08:11,350 There's no need of writing in again, because we don't want to create a separate memory. 122 00:08:11,680 --> 00:08:12,880 We just want to write to. 123 00:08:13,600 --> 00:08:13,860 OK. 124 00:08:14,260 --> 00:08:15,680 Similarly, you can write like this. 125 00:08:15,710 --> 00:08:16,040 J. 126 00:08:16,140 --> 00:08:16,590 Question. 127 00:08:16,660 --> 00:08:18,160 So the new LFG will be done. 128 00:08:18,870 --> 00:08:19,140 OK. 129 00:08:19,870 --> 00:08:22,870 So you can change the value of any variable at any time. 130 00:08:23,400 --> 00:08:25,450 And there is no need of writing in Dugin. 131 00:08:27,570 --> 00:08:28,990 OK, so let us all. 132 00:08:29,090 --> 00:08:30,250 And then interesting problem. 133 00:08:37,640 --> 00:08:40,040 Suppose I want to calculate simple interest. 134 00:08:43,910 --> 00:08:49,100 Simple interest calculator. 135 00:08:52,950 --> 00:08:53,920 Nazi BP. 136 00:09:01,320 --> 00:09:09,330 Hash include ice cream using namespace SDD 137 00:09:13,170 --> 00:09:17,610 and demesne, and then I'm having it done Zettl. 138 00:09:25,290 --> 00:09:27,560 OK, so I want to keep it simple interest. 139 00:09:28,610 --> 00:09:30,020 OK, so what is the form love? 140 00:09:30,020 --> 00:09:30,950 Simple interest. 141 00:09:31,940 --> 00:09:38,630 Simple interest equals principle multiplied it multiplied time wholly divided by hundred. 142 00:09:39,990 --> 00:09:42,020 Okay, so I need four variables here. 143 00:09:43,580 --> 00:09:46,610 And B, B for principal LEMSIP. 144 00:09:47,030 --> 00:09:47,840 Let's leave. 145 00:09:47,880 --> 00:09:52,350 Principle is handed and then semicolon. 146 00:09:52,790 --> 00:09:54,890 And ah, let's say 10. 147 00:09:56,810 --> 00:09:57,860 Entity time. 148 00:09:58,140 --> 00:09:59,190 Let's say five years. 149 00:10:00,490 --> 00:10:06,850 And end simple interest it principal multiplied eight multiplied. 150 00:10:06,880 --> 00:10:11,070 Time divided, way handed and then semicolon. 151 00:10:11,590 --> 00:10:14,290 So after calculating simple interest, what will I do? 152 00:10:14,410 --> 00:10:15,820 I will bring simple interest. 153 00:10:16,090 --> 00:10:16,810 So see old. 154 00:10:18,380 --> 00:10:19,310 Simple interest. 155 00:10:20,830 --> 00:10:22,790 Okay, so let's say it, Cornford. 156 00:10:31,560 --> 00:10:34,320 And B hundred. 157 00:10:36,600 --> 00:10:43,590 And greed equals then an end time equals. 158 00:10:43,980 --> 00:10:45,060 Suppose five years. 159 00:10:47,280 --> 00:10:49,480 And simple interest. 160 00:10:51,450 --> 00:10:51,690 It. 161 00:10:53,230 --> 00:10:59,270 Principle, multiply it eight multiplied time and then wholly divided by hundred. 162 00:11:04,810 --> 00:11:11,200 And then some column after concluding simple interest, see out simple interest. 163 00:11:16,560 --> 00:11:18,240 Okay, so virtually my output. 164 00:11:19,860 --> 00:11:20,400 Let's see. 165 00:11:22,020 --> 00:11:23,460 So simple industry equals. 166 00:11:24,560 --> 00:11:28,520 And dirty and 210 and five divided by hundred. 167 00:11:30,300 --> 00:11:31,650 So my eyes should be 50. 168 00:11:32,160 --> 00:11:33,500 OK, so let's wait and then. 169 00:11:35,950 --> 00:11:36,560 Ballenden. 170 00:11:39,250 --> 00:11:42,360 So my answer is fifteen, which is hundred percent correct. 171 00:11:44,210 --> 00:11:46,490 OK, so that is all for this video. 172 00:11:46,640 --> 00:11:47,420 Thanks for watching.