2d Matrix sum using array | C Language | Nielit O Level Question

 Q : write a program to sum 3x3 matrix using an array.

Solution : 

#include<stdio.h>

#include<conio.h>

/*============================

     Girfa Student Help

     Adding 3x3 matrix using array

==============================*/

void print(int ar[][3])

{

     int r,c;

     for(r=0;r<3;r++)

     {

           for(c=0;c<3;c++)

                printf("\t%d",ar[r][c]);

           printf("\n");

     }

}

 

void main()

{

     int ar1[3][3],ar2[3][3],arr[18],i,sum,r,c;

     clrscr();

     printf("\nEnter for first array\n\n");

     for(r=0;r<3;r++)

     {

           for(c=0;c<3;c++)

           {

                printf("Enter value for [%d][%d]>> ",r+1,c+1);

                scanf("%d",&ar1[r][c]);

           }

     }

     printf("\nEnter for second array\n\n");

     for(r=0;r<3;r++)

     {

           for(c=0;c<3;c++)

           {

                printf("Enter value for [%d][%d]>> ",r+1,c+1);

                scanf("%d",&ar2[r][c]);

           }

     }

     // input in array for sum

     for(r=0,i=0;r<3;r++)

     {

           for(c=0;c<3;c++)

           {

                arr[i]=ar1[r][c];

                i++;

           }

     }

     for(r=0;r<3;r++)

     {

           for(c=0;c<3;c++)

           {

                arr[i]=ar2[r][c];

                i++;

           }

     }

     //sum

     for(r=0,sum=0;r<i;r++)

           sum=sum+arr[r];

     clrscr();

     printf("\nArray 1\n\n");

     print(ar1);

     printf("\n\nArray 2\n\n");

     print(ar2);

     printf("\n\nSum=%d",sum);

     getch();

}

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