/* A programmer-defined square function */
#include <stdio.h>

int square(int);   /* function prototype */

main()
{
   int x;

   for (x = 1; x <= 10; x++)
      printf("%d  ", square(x));

   printf("\n");
   return 0;
}

/* Function definition */
int square(int y)
{
   return y * y;
}