#include <stdio.h>

int main() {

  unsigned i, n;
  unsigned fact = 1;

  printf("\nEscribe un entero: ");
  scanf("%u", &n);

  for (i = 1; i <= n; i++)
      fact *= i; /* fact = fact * i; */
 
  printf("\nFactorial de %u: %u.\n", n, fact);
  system("pause");
  return 0;
}