/**/
#include <stdio.h>
int main()
  {
    int a, b, c, d, sm;
    printf("Please enter 4 numbers separated by spaces > ");
    scanf("%d%d%d%d", &a, &b, &c, &d);
    if (a<b && a<c && a<d)
       printf ("%d is the smallest\n", a);
    else if (b<a && b<c && b<d)
       printf ("%d is the smallest\n", b);
    else if (c<a && c<b && c<d)
       printf ("%d is the smallest\n", c);
    else if (d<a && d<b && d<c)
       printf ("%d is the smallest\n", d);
    else 
       printf ("They have to be different numbers");
    return 0;
  }