关于c++多重继承下的函数调用注意的问题

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原创最新推荐文章于 2026-06-10 17:11:45 发布 812 阅读 AI 写同款· GEO 优化 ›

C++多继承动态交叉转换dynamic_cast 1. 问题简述：有如下源代码： Class BaseA; Class BaseB; Class SubClass:public BaseA,public BaseB { ... } 现有如下变量定义： BaseA* insA = new SubClass(...); BaseB* insB; 请问如何将insA指向的对象正确赋值给BaseB 阅读详情

#include <iostream>
using namespace std;

class A  //commserver
{
public:
	virtual void g()=0;
	virtual void f()  //f deal_all_msg  //g deal_busseines_msg
	{
		printf("A\n");
		g();
	}
};

class B:public  A  //anydsc
{
public:
	 virtual void f()
	{
		printf("B\n");
		
	}
};

class C: public  B  //uportal
{
public:
	virtual void g()
	{
		printf("C\n");
	}


};

class D:public A
{
	virtual void g()
	{
		printf("D\n");
	}
};

int main()
{
	A* x = new C;
	x->g();  //不会执行基类A里面的方法,B的f方法覆盖了
	delete x;

	A* y = new D;
	y->f();
	delete y;
	system("pause");
	return 0;
}

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