ShreeSanaviAcademy.

Write a program to evaluate the addition of diagonal elements of two square matrixes

Code: 

#include<stdio.h>
#include<conio.h>
int main()
{
    int a[10][10],b[10][10],i,j,n1,n2,sum1=0,sum2=0;
   printf("Enter the Size of first matrix\n");
    scanf("%d",&n1);
    printf("Enter the Size of Second matrix\n");
    scanf("%d",&n2); 
        printf("Enter elements of the first matrix\n");
    for(i=0;i<n1;i++)
    {
        for(j=0;j<n1;j++)
          scanf("%d",&a[i][j]);
    }
     printf("Enter elements of the second matrix\n");
    for(i=0;i<n2;i++)
    {
        for(j=0;j<n2;j++)
          scanf("%d",&b[i][j]);
    }
    
    for(i=0;i<n1;i++)
    {
        for(j=0;j<n1;j++)
        {
            if(j==i)
              sum1=sum1+a[i][j];
        }
    }
    
    for(i=0;i<n2;i++)
    {
        for(j=0;j<n2;j++)
        {
            if(j==i)
              sum2=sum2+b[i][j];
        }
    }
    printf("Sum of digonal elements in first matrix: %d\n",sum1);
    printf("Sum of digonal elements in second matrix: %d\n",sum2);
    printf("Sum of digonal elements in the both matrix: %d",sum1+sum2);
    getch();
    return 0;
}

Output: 

Enter the Size of first matrix
3
Enter the Size of Second matrix
3
Enter elements of the first matrix
2
3
1
4
5
6
7
8
9
Enter elements of the second matrix
1
5
4
2
3
6
8
7
9
Sum of digonal elements in first matrix: 16
Sum of digonal elements in second matrix: 13
Sum of digonal elements in the both matrix: 29
--------------------------------
Process exited after 23.02 seconds with return value 0
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