#include <stdio.h>

unsigned int factorial(unsigned int x) {
   if (x == 0) {
      return 1;
   } else {
      return x * factorial(x - 1);
   }
}

void print_factorial(unsigned int x) {
   printf("Factorial of %u is %u\n", x, factorial(x));
}

int main(int argc, char** argv) {
   unsigned int a = 5;
   print_factorial(a);
   return 0;
}