Soma e fatorial

#include <stdio.h>

int main(void) {

  int num, soma, fatorial;

  scanf("%d", &num);
  soma = 0;
  fatorial = 1;

  if (num > 0) {
    while (num > 0) {
      soma = soma + num;
      fatorial = fatorial * num;
      num = num - 1;
    }

    printf("soma: %d\n", soma);
    printf("fatorial: %d\n", fatorial);
  }

  return 0;
}