/* practice: worked */
#include <stdio.h>

void printFactorial(int);

void printFactorial(int N) 
{
  int prod=1;
  for( ; N>=1; N--) 
     prod*=N;
  printf("%d\n", prod);
}

const int MAX = 20;

int main(void) 
{
  int num;
  for( num = 1; num<=MAX; num++)
    printFactorial(num);
  return 0;
}