Given the following segment of codes, please add a copy constructor in the derived class B and the base class A, and test it using the main routine.

class A

{

int valuea;

public:

A() { }

int getValuea() const { return valuea; }

void setValuea (int x) { valuea = x; }

// copy constructor

};

class B : public A

{

int valueb;

public:

B() { }

int getValueb() const { return valueb; }

void setValueb (int x) { valueb = x; }

// copy constructor

};

int main ()

{

B b1;

b1.setValuea(5);

b1.setValueb(10);

B b2(b1);

cout << b2.valuea= << b2.getValuea() << b2.valueb= <<

b2.getValueb() << endl;

}