Addition of All Elements in Matrix

#include<stdio.h>
#include<conio.h>
void main()
{
int i,j,a[10][10],sum,m,n;
/* m - Number of rows 
   n - Number of Columns */
printf("\nEnter the number of Rows : ");
scanf ("%d",&m);
printf("\nEnter the number of Columns : ");
scanf ("%d",&n);
/* Accept the Elements in m x n Matrix */
for(i=0;i<m;i++)
       for(j=0;j<n;j++ )
       {
       printf("Enter the Element a[%d][%d] : ", i , j);
       scanf("%d",&a[i][j]);
       } 
/* Addition of all Elements */
sum = 0;
for(i=0;i<m;i++ )
       for(j=0;j<n;j++ )
       {
       sum = sum + a[i][j];
       } 
/* Print out the Result */
printf("\nThe Addition of All Elements in the Matrix : %d",sum);
getch();
}

Output

Enter the number of Rows : 2
Enter the number of Columns : 2
Enter the Element a[0][0] : 1
Enter the Element a[0][1] : 1
Enter the Element a[1][0] : 1
Enter the Element a[1][1] : 1
The Addition of All Elements in the Matrix : 4

Note : 2-D array needs two nested for loops