8-4(

C++多态性程序例子

#include <iostream.h>

class A
{
public:
	A() { X=Y=0; }
	A(int i, int j) { X=i, Y=j; }
	A(A &p) { X=p.X; Y=p.Y; }
	A& operator =(A &p);
	int getX() { return X; }
	int getY() { return Y; }
private:
	int X, Y;
};

A& A::operator =(A &p)
{
	X = p.X;
	Y = p.Y;
	cout<<"Assignment oprator called.\n";
	return *this;
}

void main()
{
	A a(7, 8);
	A b;
	b = a;
	cout<<b.getX()<<","<<b.getY()<<endl;
}