#include <iostream>

int main(int argc, char** argv)
{
  bool boolalpha_on;

  // get the state and print it
  boolalpha_on = std::cout.flags() & std::ios_base::boolalpha;
  std::cout << "boolalpha_on: " << boolalpha_on << "\n";

  // setting manipulators or flags hold state until they are unset.
  // the exception is the width flag ( which is more complicated )
  
  // true false
  std::cout << std::boolalpha << true << " " << false << "\n";

  // true false
  std::cout << true << " " << false << "\n";

  // get the state and print it
  boolalpha_on = std::cout.flags() & std::ios_base::boolalpha;
  std::cout << "boolalpha_on: " << boolalpha_on << "\n";

  // 1 0
  std::cout << std::noboolalpha << true << " " << false << "\n";

  // 1 0
  std::cout << true << " " << false << "\n";

  // get the state and print it
  boolalpha_on = std::cout.flags() & std::ios_base::boolalpha;
  std::cout << "boolalpha_on: " << boolalpha_on << "\n";

  return 0;
}