#include<iostream>
using namespace std;
class C {
public:
    C() { cout << "construct C" << endl; }
    ~C() { cout << "distruct C" << endl; }
    int m_c;
};
class A {
public:
    A() { cout << "construct A" << endl; }
    ~A() { cout << "distruct A"
 
 << endl; }
    int m_a;
private:
    C c;
};
class B {
public:
    B() { cout << "construct B" << endl; }
    ~B() { cout << "distruct B" << endl; }
    int m_b;
private:
    A a;
    C c;
};
int main() {
    {
        B b;
    }
    system("pause");
    return 0;
}