#include <stdio.h>
#include <stdlib.h>

int main()
{
    int m,n,i,j;
    printf("Enter m,n: ");
    scanf("%d %d", &m, &n);

    int a[2][3]= {{1, 0, m},
                  {0, 1, n}};
    int c[2][3]={1,2,3,4,5,6};
    do
    {
        if ( a[0][2] < a[1][2] )
        {
            //swap row 1 and row 2
            c[0,0] = a[0][0]; c[0,1] = a[0][1]; c[0][2] = a[0][2];
            a[0,0]= a[1][0]; a[0,1]= a[1][1] ; a[0,2]= a[1][2];
            a[1][0] = c[0,0]; a[1][1] = c[0,1]; a[1][2] = c[0,2];
            continue;
        }

        // row 1 = row 1 - row 2
        printf("test1\n");
        a[0][0]= a[0][0] - a[1][0]; a[0][1]=a[0][1] - a[1][1]; a[0][2]=a[0][2] - a[1][2];

        for ( i = 0; i <= 1; i++ )
        {
            for ( j = 0; j <= 2; j++ )
            {
            printf("a[%d][%d] = %d\t", i,j, a[i][j] );
            }
        printf("\n");
        }
    }   while( (a[0][2] - a[1][2]) != 0);

        for ( i = 0; i <= 1; i++ )
        {
            for ( j = 0; j <= 2; j++ )
            {
            printf("a[%d][%d] = %d\t", i,j, a[i][j] );
            }
        printf("\n");
        }
}