c++类的多重继承与虚拟继承

　　 举个例子，交通工具类可以派生出汽车和船连个子类，但拥有汽车和船共同特性水陆两用汽车就必须继承来自汽车类与船类的共同属性。

　　当一个派生类要使用多重继承的时候，必须在派生类名和冒号之后列出所有基类的类名，并用逗好分隔。

#include <iostream>
usingnamespacestd;

classVehicle
{
public:
Vehicle(intweight =0)
{
Vehicle::weight =weight;
}
voidSetWeight(intweight)
{
cout<<"重新设置重量"<Vehicle::weight =weight;
}
virtualvoidShowMe() =0;
protected:
intweight;
};
classCar:publicVehicle//汽车
{
public:
Car(intweight=0,intaird=0):Vehicle(weight)
{
Car::aird =aird;
}
voidShowMe()
{
cout<<"我是汽车！"<}
protected:
intaird;
};

classBoat:publicVehicle//船
{
public:
Boat(intweight=0,floattonnage=0):Vehicle(weight)
{
Boat::tonnage =tonnage;
}
voidShowMe()
{
cout<<"我是船！"<}
protected:
floattonnage;
};

classAmphibianCar:publicCar,publicBoat//水陆两用汽车,多重继承的体现
{
public:
AmphibianCar(intweight,intaird,floattonnage)
:Vehicle(weight),Car(weight,aird),Boat(weight,tonnage)
file://多重继承要注意调用基类构造函数
{

}
voidShowMe()
{
cout<<"我是水陆两用汽车！"<}
};
intmain()
{
AmphibianCar a(4,200,1.35f);//错误
a.SetWeight(3);//错误
system("pause");
}