#include "library.h"

void collatz(const int n)
{ cout << n << " ";
  if (n == 1)
  { cout << "\n";
    return; }
  if (n % 2 == 0)
    collatz(n/2);
  else
    collatz(3*n+1); }

bool want_to_go_again()
{ while (true)
  { cout << "Do you want to go again? ";
    const string s = read_string();
    if (s == "yes")
      return true;
    if (s == "no")
      return false; } }

void main()
{ while (true)
  { print("Enter a number: ");
    const int n = read_int();
    collatz(n);
    new_line();
    if (! want_to_go_again())
      break; }
  cout << "End of program\n"; }