#include <iostream>

class B {
 public:
  B(const B &) = delete;

  B(int v) : val(v){};
  virtual ~B();
  int getVal() { return val; };

 private:
  int val;
};

class A {
 public:
  A() : val(10){};
  virtual ~A();

  auto &getBVal() { return val; };

 private:
  B val;
};

int main(void) {
  auto val = f();

  std::cout << val << std::endl;

  A klass;

  auto val2 = klass.getBVal();

  std::cout << val2.getVal() << std::endl;
  return 0;
}