多重继承虚继承组合

最新推荐文章于 2025-07-10 19:41:33 发布

转载最新推荐文章于 2025-07-10 19:41:33 发布 · 307 阅读

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本文通过一个C++程序示例介绍了多重继承与虚继承的概念及应用。代码中定义了多个类，如商品类（Goods）、相机类（Camera）、MP3类（MP3）和手机类（Phone），并通过现代手机类（ModernPhone）展示了如何实现多重继承，并使用虚继承避免二义性问题。

#include<iostream>
using namespace std;
//虚继承的基类成为虚基类虚基类构造函数的参数由底层子类直接传递
class Goods{
double price;
public:
Goods(double p = 123.45):price(p){cout<<"Goods("<<p<<')'<<endl;}
~Goods(){cout<<"~Goods()"<<endl;}
double getPrice(){return price;}
};

class Camera:virtual public Goods{
public:
void take(const char* obj){
cout<<"给"<<obj<<"照相"<<endl;
}
Camera(double p):Goods(p){cout<<"Camera()"<<endl;}
~Camera(){cout<<"~Camera()"<<endl;}
};

class MP3:virtual public Goods{
public:
void play(const char* obj){
cout<<"给"<<obj<<"mp3"<<endl;
}
MP3(double p):Goods(p){cout<<"MP3()"<<endl;}
~MP3(){cout<<"~MP3()"<<endl;}
};

class Phone:virtual public Goods{
public:
void dial(const char* obj){
cout<<"给"<<obj<<"Phone"<<endl;
}
Phone(double p):Goods(p){cout<<"Phone()"<<endl;}
~Phone(){cout<<"~Phone()"<<endl;}
};
//多个父类按继承顺序构造函数
class ModernPhone:public Phone//,public MP3,public Camera此为多重继承
{
string factory;
//组合
Goods g;
Camera c;
MP3 m;
public:
void visitnet(const char* url)
{
cout<<"访问网站："<<url<<endl;
}
//多重继承定义的
// void take(const char* obj){cout<<"给"<<obj<<"eheda "<<endl;}

ModernPhone(const char* factory,double price)//多重继承传法 :Phone(price-1),MP3(price-10),Camera(price-100),factory(factory),Goods(price-22)
:g(price),c(price),Phone(price),factory(factory),m(price)
{cout<<"ModernPhone()"<<endl;}
~ModernPhone(){cout<<"~ModernPhone()"<<endl;}

void take(const char* obj){c.take(obj);}
void play(const char* song){m.play(song);}
double getPrice(){return g.getPrice();}
};

int main()
{
ModernPhone mp("nokia",500);
mp.dial("100");
mp.play("北京");
mp.visitnet("baidu.com");
mp.take("健康");
cout<<mp.getPrice()<<endl;

}