YTU 2622: B 虛拟繼承（虛基類）-沙發床（改錯題）

2622: B 虛拟繼承（虛基類）-沙發床（改錯題）

時間限制: 1 Sec  

記憶體限制: 128 MB

送出: 487  

解決: 393

題目描述

 有一種特殊的床，既能當床(Bed)用又能當沙發(Sofa)用，是以叫沙發床(SleeperSofa)。

同時床和沙發又是一種特殊的家具(Furniture)，具有一切家具的特性。

利用虛拟繼承（虛基類）建立一個類的多重繼承,沙發床繼承了床和沙發的特性。

下面的程式中，在begin到end部分存在文法錯誤。請改正錯誤，使程式按下面輸入輸出的規定運作。

注意：隻送出修改過的begin到end部分的代碼。

#include <iostream>
 using namespace std; //家具類Furniture
 class Furniture
 {
 public:
 Furniture(double w)
 { weight=w; }
 void display()
 {
 cout<<"weight:"<<weight<<endl;
 }
 protected:
 double weight; //家具重量
 };//******************** begin ********************
 //床類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; //床的長
 double width; //床的寬 
 }; //沙發類Sofa
 class Sofa: public Furniture
 { public:
 Sofa(double w,double h):Furniture(w),height(h){}
 void display()
 {
 cout<<"height:"<<height<<endl;
 }
 protected:
 double height; //沙發的高度 
 }; //沙發床
 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;
 }      

輸入

依次輸入沙發床的重量、長、寬、高  

輸出

依次輸出沙發床的重量、長、寬、高

樣例輸入

200 1.8 1.5 1.2      

樣例輸出

weight:200
length:1.8
width:1.5
height:1.2      

提示

改錯思路有多種，隻要程式能運作出正确結果，怎樣改錯都可以

迷失在幽谷中的鳥兒，獨自飛翔在這偌大的天地間，卻不知自己該飛往何方……

#include <iostream>
using namespace std;
//家具類Furniture
class Furniture
{
public:
    Furniture(double w)
    {
        weight=w;
    }
    void display()
    {
        cout<<"weight:"<<weight<<endl;
    }
protected:
    double weight; //家具重量
};
//床類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; //床的長
    double width; //床的寬
};
//沙發類Sofa
class Sofa: public Furniture
{
public:
    Sofa(double w,double h):Furniture(w),height(h) {}
    void display()
    {
        cout<<"height:"<<height<<endl;
    }
protected:
    double height; //沙發的高度
};
//沙發床
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;
}