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

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#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;
}