本文主要是介绍OJ第六批——Problem J: B 虚拟继承（虚基类）-沙发床（改错题），希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
问题及代码：
Problem J: B 虚拟继承（虚基类）-沙发床（改错题）
Time Limit: 1 Sec Memory Limit: 128 MBSubmit: 442 Solved: 353
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Description
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;
}
Input
依次输入沙发床的重量、长、宽、高
Output
依次输出沙发床的重量、长、宽、高
Sample Input
200 1.8 1.5 1.2
Sample Output
weight:200
length:1.8
width:1.5
height:1.2
HINT
#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
};
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; //床的长
double width; //床的宽
};
//沙发类Sofa
class Sofa:virtual 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):Furniture(we) ,Bed(we,l,wi),Sofa(we,h) { }
void display()
{
cout<<"weight:"<<Furniture::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;
}
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