include cstdlib include iostream using std cout using std endl class p

#include <cstdlib>
#include <iostream>

using std::cout;
using std::endl;

class A {
public:
    A() { cout << "A()" << endl; }
    ~A() { cout << "~A()" << endl; }
};

class B : public A {
public:
    B() { cout << "B()" << endl; }
    ~B() { cout << "~B()" << endl; }
};

int main()
{
    B b;
    return EXIT_SUCCESS;
}