#include<stdio.h>
#include<conio.h>

void main()
{
    int i,j,row,col,a[10][10];
    clrscr();

    printf("Enter the number of row ::  ");
    scanf("%d",&row);

    printf("Enter the number of column ::  ");
    scanf("%d",&col);

    if(row == col)
    {
        printf("\n");
        printf("Desired matrix is  \n\n");
        for(i=1;i<=row;i++)
        {
            printf("\n");
            for(j=1;j<=col;j++)
            {
                if (i == j)
                printf(" 1 ");
                else
                printf(" 0 ");
            }
        }
    }
    else
    printf("Must enter row and column equals  \n");
    getch();
}


/*
    **********
    OUTPUT
    **********

    Enter the number of row ::  9
    Enter the number of column ::  9

    Desired matrix is


     1  0  0  0  0  0  0  0  0
     0  1  0  0  0  0  0  0  0
     0  0  1  0  0  0  0  0  0
     0  0  0  1  0  0  0  0  0
     0  0  0  0  1  0  0  0  0
     0  0  0  0  0  1  0  0  0
     0  0  0  0  0  0  1  0  0
     0  0  0  0  0  0  0  1  0
     0  0  0  0  0  0  0  0  1

*/