#include<iostream>

class Integertest {public: int value;};

void test(Integertest &a) {
  a = Integertest();
  a.value = 5;
}

int main() {
  Integertest b;
  b.value = 50;
  std::cout << b.value;
  test(b);
  std::cout << b.value;
}