#include <stdio.h>

int primes[] = { 1 , 2, 3, 5, 7, 11, 13, 17, -1}; 

int main ()
{
   int i;
   for (i = 0; primes[i] != -1; i++)
   {
      printf("The %dth prime is: %d\n",i,primes[i]);
   }   
   return 0;
}