C Program TO FIND THE SUM OF PRIMARY DIAGONAL OF A MATRIX | Matrix Program in C | Diagonal Sum of two matrix in C

C Program TO FIND THE SUM OF PRIMARY DIAGONAL OF A MATRIX | Matrix Program in C | Diagonal Sum of two matrix in C

#include
void main()
{
      int A[5][5],i,j,m,n,sum = 0;
      clrscr();
      printf("\n\n\t ENTER A ORDER OF THE MATRIX M,N...: ");
      scanf("%d,%d",&m,&n);
      printf("\n\n\t ENTER THE ELEMENTS OF THE MATRIX..:\n\n");
      if(m == n)
      {
            for(i=1;i<=m;i++)
            {
                 for(j=1;j<=n;j++)
                 {
                       gotoxy(20+j*4,12+i*2);
                       scanf("%d",&A[i][j]);
                 }
                 printf("\n");
            }
            for(i=1;i<=m;i++)
                 sum = sum + A[i][i];
            printf("\n\t THE SUM OF PRIMARY DIAGONAL OF A MATRIX IS...: %d", sum);
      }
      else
      {
            printf("\n\t THE ORDER OF THE MATRIX IS NOT CORRECT");
            printf("\n\n\t HELP : 'M' SHOULD BE EQUAL TO 'N'");
       }
       getch();
}