【千律】C++基础：多态性与虚函数

虚函数：

        通过父类的指针，指向子类的对象。调用虚函数时，调用子类的函数。

#include <iostream>
using namespace std;

class CDog 
{
public:
    // 声明虚函数
	virtual void barking()
	{
		cout << "All dogs are barking!" << endl;
	}
};

class CGolden : public CDog
{
public:
	 void barking()
	{
		cout << "Golden retrievers are barking!" << endl;
	}
};

class CTibetan : public CDog
{
public:
	void barking()
	{
		cout << "Tibetan mastiffs are barking!" << endl;
	}
};

int main()
{
	// 初始化子类
	CGolden golden;
	CTibetan tibetan;
	
	// 父类指针指向子类
	CDog* dog1 = &golden;
	CDog* dog2 = &tibetan;

	// 通过父类指针调用子类函数
	dog1->barking();
	dog2->barking();

	return 0;
}