C++之函数重载，重写，重定义

#include<iostream>

using std::cout;
using std::endl;

class Parent
{
public:
	void fun1()
	{
		cout << "fun1()" << endl;
	}
	void fun2()
	{
		cout << "fun2()" << endl;
	}
	void fun1(int)
	{
		cout << "fun1(int)" << endl;
	}
	virtual void fun3()
	{
		cout << "fun3()" << endl;
	}
};

class Son : public Parent
{
public:
	void fun3()
	{
		cout << "重写fun3()" << endl;
	}
	void fun2()
	{
		cout << "重定义fun2()" << endl;
	}
};

int main()
{
	Parent p;
	p.fun1();
	p.fun2();
	p.fun3();
	p.fun1(1);
	cout << endl;
	Son s;
	s.fun1();
	s.fun2();
	s.fun3();
	cout << endl;
	Parent* q = new Son;
	q->fun1();
	q->fun2();
	q->fun3();

	return 0;
}