Learn Programming Technique C to Master Skills - Double Dimension Array Program - video Dailymotion

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00:00Hello everyone, today I am going to explain program of double dimension array and in this

00:10program I am going to cover to display the matrix 2 by 2.

00:18So if I have to display matrix 2 by 2, how I am going to do this?

00:23For this 7th number program I am going to perform that is to display 2 by 2 matrix ok.

00:36For that I have to use double dimension array and when I declare double dimension array

00:49the first two represents to the rows and the second one represents to the column, it will

00:59be like this.

01:00Let me again write down how the declaration will be.

01:08It will be like int a, the first one two represents to rows and the second one represents to the

01:16column.

01:17As I have to store the values in rows and columns, so at the run time the memory which

01:23is going to allocate is going to allocate in this way.

01:28This particular cell, this particular memory space will be called the 0 row 0 column ok.

01:36Then row will be the same but the column gets changed, so this particular cell position

01:41will be called 0 row first column, then the rows then the row gets changed, so this particular

01:48cell will be called first row 0 column and then what first row first column.

01:54So in a sequence way the memory is going to allocate and then values are going to store

02:00inside it.

02:02And I have a draw in this way in a matrix form as I have to make the program of a matrix

02:10ok.

02:11I have shown thus values in the location in a matrix form ok and in this way the values

02:20are also going to display ok.

02:23But actually the memory location which is going to allocate that is allocate in a sequence

02:29form ok.

02:31So I am going to quickly make the program, as I have explained that this is the 0th row

02:40first column and in the 0th row first column this is the first value which is stored.

02:45In the 0th row first column there is the second value which is going to store, in the first

02:50row 0th column there is another value which is stored, in the first row first column this

02:5720 is going to store ok.

02:59And then the same formation as for the convenient I have explained in a matrix form the display

03:09also will be in the same way 20 10 30 and 20.

03:12So how to do this for that I have to apply loop within loop ok and here I am going to

03:22make the program of it to store the values inside that double dimension array and then

03:30to display in a matrix form.

03:32So let us see, let me save also it ok, first thing what I will do I will declare double

03:51dimension array that is int a 2 and then again 2 which is having two rows and two columns

04:01ok.

04:02With it I will use two variables also i and j, i is going to go with the rows and j is

04:09going to go with the columns, here I will give a message what input values ok.

04:19So I have given a message here values which I have to input, so to input it I have to

04:23apply the loop i equals to 0 then what i less than equal to 1 and i plus plus ok and inside

04:34it I will again apply the loop that is j equals to 0, j less than equal to 1 and then what

04:41j plus plus ok.

04:44So the second loop is going to go to the column, the outer loop is going to go to rows.

04:49Now with the scanf I will use %d, and a i and then what j ok, in this way the values

05:03are going to store inside the double dimension array but I have to display it in a matrix

05:10form, so here I will give a message display of values in form of 2 by 2 matrix ok.

05:35So to do this what I will do, I will again apply the loop for i equals to 0, i less than

05:44equals to 1 and then what i plus plus inside it I will again apply the loop for the columns

05:51to cover i j equals to 0, j less than equal to 1 and then what j plus plus ok and then

06:02I will write on what printf %d, and sign and sorry not and sign then I have to give

06:16the location a i and here what j and below of it printf some spaces ok.

06:31When the inner loop will terminate then I have to take the cursor on the next row for

06:36that I will use what slash n, so I hope everything is fine and it's going to work perfectly.

06:45Let me save it, just click on build ok and run the program it's asking me to input the

06:54values so let me input the four values ok.

06:59Now let us press the enter key and I press it so it is displayed in the 2 by 2 matrix

07:04form ok.

07:05So let us understand when I have applied the loop, when I have applied loop within loop

07:10and we have understand how the loop within loop works, I have explained the programs

07:15of loop within loop how it works in my previous videos ok.

07:20So it will start the value of i is what 0, 0 less than 1 condition is true, it will come

07:26to the inner loop the value of j is what 0, 0 less than 1 the condition is true, so we

07:31are talking about 0 row 0 column position that is at this position ok.

07:36Suppose I input 50, so the 50 is going to store here in 0 row 0 position ok of double

07:45dimension array then the value of j is going to increment by 1, 1 equal to 1 the condition

07:51is true.

07:52Now i is what 0 but j gets changed it's 1, so we are talking about 0 1 position, so 0

07:591 position is where this one, so the next value which the scanf is going to read and

08:05store that is inside the 0 and 1st, 0 row 1st column ok.

08:12And again the value of j is going to increment to 2, 2 less than 1 condition get false it's

08:17going to the outer loop, the value of i is going to increment by 1, 1 equal to 1 the

08:23condition is true again it will come in the inner loop it will start from its initial

08:27value the value of j is what 0, 0 less than 1 the condition is true.

08:32Now which position we are talking the value of i is 1 but the value of j is what 0, so

08:39we are talking about this position, so suppose we have input 85, so that is going to 86 that

08:44is going to store in this position then the value of j is going to increment by 1, 1 equal

08:52to 1 the condition is true, now this time the value of i is also 1, the value of j is

08:57also 1, so the next value which is going to store that is in the 1st row 1st column ok.

09:04Now these values are stored but we have to display in a matrix form, so for that I have

09:09again applied loop within loop ok and I have given a message first again the loop will

09:15start the value of i is 0, 0 less than 1 the condition is true it's come to the inner loop

09:20the value of j is 0, 0 less than 1 the condition is true we are talking about the 0, 0 position

09:26of an array from here that the value is going to display on the screen with some space also.

09:35So what is the value inside the memory it's 50 that is going to display on the screen

09:40ok then the value of j is going to increment to 1, 1 equal to 1 the condition is true,

09:48so the value of i is 0 but the j gets changed to 1, so we are talking about the 0, 1 position

09:56that is this position, so value will come and then after some space it's going to display

10:04ok then what will happen the value of j is going to increment to 2, 2 less than 1 condition

10:11get false it will go to the outer loop the value of i is going to increment by 1.

10:16Now the value of form of i from 0 it's now 1 it will come to the decision part 1 equal

10:22to 1 the condition is true again it will come to the inner loop which is going to start

10:28from its initial value that is 0 will come to the decision part 0 less than 1 the condition

10:33is true.

10:34Now this time the value of i is 1 but the value of j is what 0, so we are talking about

10:41this position 1 0 ok, so the next value which is going to display ok that is on the next

10:48row because why it's going to display on the next row because when this loop was terminated

10:57when the value of j from 1 when it was 2, 2 less than 1, so when this inner loop terminated

11:06this it find what printf and it's having what slash n the cursor which was blinking after

11:16the display of 70 ok it will come here down to this position after 70 it's came down and

11:25then the value of i increment to 1, 1 equal to 1 the condition is true it will come here

11:33to the inner loop inner for loop where the value of j is what 0, 0 less than 1 condition

11:40is true.

11:41So now this time we are talking about 1 0 position ok, so what is the value inside the

11:461 0 position that is what 86 that is going to display on the screen ok I hope you understand

11:52with some space ok then the value of j is going to increment by 1, 1 equal to 1 the

12:00condition is true now we are talking about the first row and the first column as the

12:04value of i is 1 and the value of j is also 1 ok.

12:08So let us see what is there in the first row first column it is 90 so after some space

12:13it's going to display then the value of j is going to increment by 2, 2 less than 1

12:21condition gets false this loop will terminate the cursor will come on the next row by the

12:27use of slash n it will go to the outer loop the value of i increment to 2 ok it will come

12:34to this part to the decision 2 less than 1 here also the condition will get false but

12:40we will get the final result that is in a matrix form in a 2 by 2 matrix formation we

12:50get the result ok so this is the program friends which I have explained of 2 by 2 matrix

12:59in the next video I will explain something else thanks.

Learn Programming Technique C to Master Skills - Double Dimension Array Program

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