In c++ Suppose that you have the following classes: classA and classB:

class classA { public: virtual void print() const; void doubleNum(); classA(int a = 0);

private: int x; };

void classA::print() const { cout << "ClassA x: " << x << endl; }

void classA::doubleNum() { x = 2 * x; }

classA::classA(int a) { x = a; }

class classB: public classA { public: void print() const; void doubleNum(); classB(int a = 0, int b = 0);

private: int y; };

void classB::print() const { classA::print(); cout << "ClassB y: " << y << endl; }

void classB::doubleNum() { classA::doubleNum();

y = 2 * y; }

classB::classB(int a, int b) : classA(a) { y = b; }

What is the output of the following function main?

int main() { classA *ptrA; classA objectA(2);

classB objectB(3, 5);

ptrA = &objectA; ptrA->doubleNum(); ptrA->print(); cout << endl;

ptrA = &objectB;

ptrA ->doubleNum(); ptrA->print(); cout << endl;

return 0; }