The argument of 2 – D array can be passed to a function in the same way 1-D arrays are passed.

Program – Add the diagonal elements of a matrix

#include<stdio.h>
#include<stdlib.h>
void main ()
{
      int a [10] [10], j, m, n, sum;
      printf (“How many rows?”);
      scanf (“%d”, &m);
      printf (How many columns?”);
      scanf (“%d”, &n);
      if (m! =n)
      {
    printf (“sum of diagonal is not possible”);
    exit (0);
      }
      printf (“\nEnter &d *d matrix \ n”, m, n)’
      for (i = 0; i<m; i++)
        for (j = 0; j<n; j++)
         scanf (“%d”, &a [i] [j]);
      printf (“\nMatrix is \n”):
      for (I = 0; i<m; i++)
      {
    for (j = 0; j<n; j++)
    printf (“%4d”, a[i], [j]);
    ptintf (“\n”)
      }
      sum = diagonal _sum (a, m);
      printf (“\nSum of diagonal = %d”, sum);
}
Int diagonal _sum (int x [] [10], int p)
{
int s = 0, i,
for (i = 0; i<p; i++)
      s = s + x[i] [i];
return s;
}

Output

How many rows ?3
How many columns ?4
Sum of diagonal is not possible
Sum of diagonal is not possible

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