2960: 改错题--小鼠标,你要干什吗？
时间限制: 1 Sec 内存限制: 128 MB
提交: 118 解决: 62
题目描述
鼠标双击不同的图标产生不同的效果，比如双击文档（document）文件，则打开文档文件；双击图形（graphics）文件，则显示图形；双击视频（video）文件，则播放视频。下面程序是鼠标的双击三种文档、图形和视频类型文件的程序。
注：本题只需要提交修改和完善部分的代码，请按照C++方式提交。
#include <string>
#include <iostream>
using namespace std;
/* 修改和完善该部分代码
class Filetype
{
public:
void DoubleClick() =0;
virtual Filetype(string name)
{
Filename = name;
}
string getFilename()
{
return Filename;
}
virtual ~Filetype() {}
private:
string Filename;
};
*/
class Documenttype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Document file :"<< getFilename()<<endl;
}
Documenttype(string name):Filetype(name)
{
}
};
class Graphicstype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Graphics file :"<< getFilename()<<endl;
}
Graphicstype(string name):Filetype(name)
{
}
};
class Videotype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Video file :"<< getFilename()<<endl;
}
Videotype(string name):Filetype(name)
{
}
};
int main()
{
string name;
Filetype *ptype;
cin>>name;
ptype=new Documenttype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Graphicstype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Videotype(name);
ptype->DoubleClick();
delete ptype;
return 0;
}
输入
输入有3行
第一行是一个文档文件名，第二行是一个图形文件名，第三行是一个视频文件名
输出
第一行输出Document file :文档文件名
第二行输出Graphics file :图形文件名
第三行输出Video file :视频文件名
样例输入
a.txt
b.bmp
c.mp4
样例输出
Document file :a.txt
Graphics file :b.bmp
Video file :c.mp4
你 离 开 了 ， 我 的 世 界 里 只 剩 下 雨 。 。 。
#include <string>
#include <iostream>
using namespace std;
class Filetype
{
public:
virtual void DoubleClick() =0;
Filetype(string name)
{
Filename = name;
}
string getFilename()
{
return Filename;
}
virtual ~Filetype() {}
private:
string Filename;
};
class Documenttype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Document file :"<< getFilename()<<endl;
}
Documenttype(string name):Filetype(name){}
};
class Graphicstype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Graphics file :"<< getFilename()<<endl;
}
Graphicstype(string name):Filetype(name){}
};
class Videotype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Video file :"<< getFilename()<<endl;
}
Videotype(string name):Filetype(name){}
};
int main()
{
string name;
Filetype *ptype;
cin>>name;
ptype=new Documenttype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Graphicstype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Videotype(name);
ptype->DoubleClick();
delete ptype;
return 0;
}
#include <iostream>
using namespace std;
class Filetype
{
public:
virtual void DoubleClick() =0;
Filetype(string name)
{
Filename = name;
}
string getFilename()
{
return Filename;
}
virtual ~Filetype() {}
private:
string Filename;
};
class Documenttype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Document file :"<< getFilename()<<endl;
}
Documenttype(string name):Filetype(name){}
};
class Graphicstype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Graphics file :"<< getFilename()<<endl;
}
Graphicstype(string name):Filetype(name){}
};
class Videotype:public Filetype
{
public:
void DoubleClick()
{
cout<<"Video file :"<< getFilename()<<endl;
}
Videotype(string name):Filetype(name){}
};
int main()
{
string name;
Filetype *ptype;
cin>>name;
ptype=new Documenttype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Graphicstype(name);
ptype->DoubleClick();
delete ptype;
cin>>name;
ptype=new Videotype(name);
ptype->DoubleClick();
delete ptype;
return 0;
}