memb_pt.cpp

// memb_pt.cpp -- dereferencing pointers to class members
#include <iostream>
using namespace std;

class Example
{
private:
	int feet;
	int inches;
public:
	Example();
	Example (int ft);
	~Example();
	void show_in()const;
	void show_ft()const;
	void use_ptr()const;
};

Example:: Example()
{
	feet = 0;
	inches = 0;
}

Example:: Example (int ft)
{
	feet = ft;
	inches = 12 * feet;
}

Example:: ~Example()
{
}

void Example:: show_in()const
{
	cout << inches << " inches\n";
}

void Example:: show_ft()const
{
	cout << feet << " feet\n";
}

void Example:: use_ptr()const
{
	Example yard (3);
	int Example:: *pt;
	pt = &Example:: inches;
	cout << "Set pt to &Example:: inches: \n";
	cout << "this->pt: " << this->*pt << endl;
	cout << "yard.*pt: " << yard.*pt << endl;
	pt = &Example:: feet;
	cout << "Set pt to &Example:: feet: \n";
	cout << "this->pt: " << this->*pt << endl;
	cout << "yard.*pt" << yard.*pt << endl;
	void(Example:: *pf) ()const;
	pf = &Example:: show_in;
	cout << "Set pf to &Example:: show_in: \n";
	cout << "Using (this->*pf) (): ";  // apply static member function
	(this->*pf) ();
	cout << "Using (yard.*pf) (): ";
	(yard.*pf) ();
}

int main()
{
	Example car (15);
	Example van (20);
	Example garage;
		cout << "car.use_ptr()output: \n";
		car.use_ptr();
		cout << "\nvan.use_ptr()output: \n";
		van.use_ptr();

		return 0;
}