[YTU]_2622(B 虚拟继承（虚基类）-沙发床（改错题）)

题目描述

 有一种特殊的床，既能当床(Bed)用又能当沙发(Sofa)用，所以叫沙发床(SleeperSofa)。

同时床和沙发又是一种特殊的家具(Furniture)，具有一切家具的特性。

利用虚拟继承（虚基类）建立一个类的多重继承,沙发床继承了床和沙发的特性。

下面的程序中，在begin到end部分存在语法错误。请改正错误，使程序按下面输入输出的规定运行。

注意：只提交修改过的begin到end部分的代码。

#include <iostream>
using namespace std;

//家具类Furniture
class Furniture
{
public:
Furniture(double w)
{ weight=w; }
void display()
{
cout<<"weight:"<<weight<<endl;
}
protected:
double weight; //家具重量
};

//******************** begin ********************
//床类Bed
class Bed: public Furniture
{
public:
Bed(double we,double l,double wi):Furniture(we),length(l),width(wi){}
void display()
{
cout<<"length:"<<length<<endl;
cout<<"width:"<<width<<endl;
}
protected:
double length; //床的长
double width; //床的宽
};

//沙发类Sofa
class Sofa: public Furniture
{ public:
Sofa(double w,double h):Furniture(w),height(h){}
void display()
{
cout<<"height:"<<height<<endl;
}
protected:
double height; //沙发的高度
};

//沙发床
class SleeperSofa:public Bed, public Sofa
{public:
SleeperSofa(double we,double l,double wi,double h):Bed(we,l,wi),Sofa(we,h){ }
void display()
{
cout<<"weight:"<<weight<<endl;
Bed::display();
Sofa::display();
}
};

//********************* end ********************

int main()
{
double weight,length,width,height;
cin>>weight>>length>>width>>height;

SleeperSofa ss(weight,length,width,height);
ss.display();

return 0;
}

输入

依次输入沙发床的重量、长、宽、高  

输出

依次输出沙发床的重量、长、宽、高

样例输入

200 1.8 1.5 1.2

样例输出

weight:200length:1.8width:1.5height:1。。。。

#include <iostream>using namespace std; //家具类Furnitureclass Furniture{  public:     Furniture(double w)      { weight=w; }     void display()     {         cout<<"weight:"<<weight<<endl;     }  protected:    double weight; //家具重量};class Bed:virtual public Furniture{public:    Bed(double we,double l,double wi):Furniture(we),length(l),width(wi){}    void display()    {        cout<<"length:"<<length<<endl;        cout<<"width:"<<width<<endl;    }protected:    double length;    double width;};class Sofa:virtual public Furniture{public:    Sofa(double w,double h):Furniture(w),height(h){}    void display()    {        cout<<"height:"<<height<<endl;    }private:    double height;};class SleeperSofa:public Bed,public Sofa{public:    SleeperSofa(double we,double l,double wi,double h):Furniture(we),Bed(we,l,wi),Sofa(we,h){}    void display()    {        cout<<"weight:"<<weight<<endl;    Bed::display();    Sofa::display();    }};int main(){  double weight,length,width,height;  cin>>weight>>length>>width>>height;   SleeperSofa ss(weight,length,width,height);  ss.display();     return 0;}