C++在父类和子类之间进行转型时脑抽做了个试验

最爱麦丽素

于 2015-03-02 12:26:26 发布

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CC 4.0 BY-SA版权

分类专栏：试验文章标签： c++

本文链接：https://blog.youkuaiyun.com/l786112323/article/details/44016891

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class baseA{
public:

};
class extdA:public baseA{
public:
	void fun(){
		cout << "extdA"<<endl;
	}
};
class extdB :public baseA{
public:
	void fun(){
		cout << "extdB" << endl;
	}
	baseA* change(int a){

	}
};
int main(int argc, char* argv[])
{
	baseA *ba = new extdA();
	extdB *ea = (extdB*)ba;
	ea->fun();
}

//out

extdB

class baseA{
public:
	virtual void fun(){
		cout << "baseA" << endl;
	}
};
class extdA:public baseA{
public:
	void fun(){
		cout << "extdA"<<endl;
	}
};
class extdB :public baseA{
public:
	void fun(){
		cout << "extdB" << endl;
	}
	baseA* change(int a){

	}
};
int main(int argc, char* argv[])
{
	baseA *ba = new extdA();
	extdB *ea = (extdB*)ba;
	ea->fun();
}

//out

extdA

不明所以，若有大神，还请指教