Guess my number in C

guess_my_number.c

#include <stdio.h>

void guess(int n, int low, int upper){
  int guess_number = (upper + low) / 2;
  if(guess_number < n){
    printf("Tu número no es %d\n", guess_number);
    guess(n, guess_number, upper);
  }
  if(guess_number > n){
    printf("Tu número no es %d\n", guess_number);
    guess(n, low, guess_number);
  }
  if(guess_number == n)
    printf("Tu número es %d\n", guess_number);
}

int main(){
  int low_limit = 0;
  int upper_limit = 1000;
  printf("Hola mundo!!!!\n");
  guess(813, low_limit, upper_limit);
  return 0;
}