#include <iostream>
#include <string>

std::string f() {
  return "f";
}

std::string g() {
  return "g";
}

int main() {
  const char * s = f().c_str();
  std::cout << "s = " << s << std::endl;
  std::cout << "g() = " << g() << std::endl;
  std::cout << "s = " << s << std::endl;
}