YTU 2622: B 虚拟继承（虚基类）-沙发床（改错题）

2622: B 虚拟继承（虚基类）-沙发床（改错题）

时间限制: 1 Sec  内存限制: 128 MB
提交: 487  解决: 393

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:200
length:1.8
width:1.5
height:1.2

提示

改错思路有多种，只要程序能运行出正确结果，怎样改错都可以

迷失在幽谷中的鸟儿，独自飞翔在这偌大的天地间，却不知自己该飞往何方……

#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
};
//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 Furniture
{
public:
    SleeperSofa(double we,double l,double wi,double h):Bed(we,l,wi),Sofa(we,h),Furniture(we) { }
    void display()
    {
        cout<<"weight:"<<weight<<endl;
        Bed::display();
        Sofa::display();
    }
protected:
    double weight=200;
};
int main()
{
    double weight,length,width,height;
    cin>>weight>>length>>width>>height;
    SleeperSofa ss(weight,length,width,height);
    ss.display();
    return 0;
}