#include <iostream>

using namespace std;

class A{
public:
    int m_a;

public:
    A(int a): m_a(a){
        cout << "A class " << m_a;
    }
};

class B: public A{
public:
    int m_b;

public:
    B(int a,int b): A(a), m_b(b){
        cout << "\nB class " << m_a << " " << m_b;
    }
};

int main(){
    B *b = new B(12, 5);
    return 0;
}