/**
  * UPEM / Compilation / Projet TPC
  * Exemple de fichier source TPC valide
  * Pacien TRAN-GIRARD, Adam NAILI
  */

const special = 'b';

char funky_func(int arg) {
  return !arg;
}

void main(void) {
  char ret;
  ret = 1 + funky_func(0) * 2;

  while (ret) {
    readc(ret);
    print(ret);

    if (ret == special) print('!');
  }
}