Program for Sum of Diagonal Elements of a Square Matrix

#include<stdio.h>

#include<conio.h>

main ( )

{

int a [10][10],m, n, i, j, s=0;

printf ( “enter number of rows and columns”);

scanf (“%d%d”, & m, & n);

printf ( “enter elements into an array”);

for ( i = 0; i < m; i ++)

{

  for (j=0; j < m; j ++)

  {

    scanf(“%d”,&a[i][j]);

  }

}

for ( i = 0; i < m, i ++)

{

  for ( j = 0; j < n; j ++)

  {

   If (  i = = j)

   {

    s=s +a [i][j];

   }

  }

}

printf(”\n sum of diagonal elements is %d”, s);

getch ( );

}