C++编程 图形类 画简单图形类
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{
cout<<"请输入图形名称：（圆形、矩形、平行四边形、梯形、三角形）"
<<endl<<"图形类型: "<<endl;
cin>>name;
}
virtual void getarea()
{
}
char* getname()
{
return (char*) name;
}
};
class yuan:public tuxing
}
};
class sanjiaoxing:public tuxing
{
void gettuxing()
{
cout<<"请输入底和高："<<endl;
cin>>length>>width;
}
void getarea()
{
double area=0.5*length*width;
cout<<"所求三角形面积为："<<endl<<area<<endl;
{
public:
void gettuxing()
{
cout<<"请输入长宽：（格式为：长+空格+宽）"<<endl;
cin>>length>>width;
}
void getarea()
{Байду номын сангаас
area=length*width;
cout<<"矩形面积为："<<endl<<area<<endl;
}
};
class pxsbx:public tuxing
{
tixing B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"三角形")==0)
{
sanjiaoxing B;
b=&B;
b->gettuxing();
b->getarea();
}
goto label;
}
{
juxing B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"平行四边形")==0)
{
pxsbx B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"梯形")==0)
{
private:
double w1,w2,h;
public:
void gettuxing()
{
cout<<"请输入上底下底和高："<<endl;
cin>>w1>>w2>>h;
}
void getarea()
{
double area=0.5*(w1+w2)*h;
cout<<"所求梯形面积为："<<endl<<area<<endl;
{
private:
double r;
public:
void gettuxing()
{
cout<<"请输入半径："<<endl;
cin>>r;
}
void getarea()
{
area=r*r*4*atan(1);
cout<<"所求圆面积为："<<endl<<area<<endl;
}
};
class juxing:public tuxing
图形类
#include<iostream.h>
#include<string.h>
#include<math.h>
//定义图形类
class tuxing
{
private:
char name[50];
public:
double length,width,area;
virtual void gettuxing()
}
};
void main()
{
tuxing A,*b;
label:
A.gettuxing();
if(strcmp(A.getname(),"圆")==0)
{
yuan B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"矩形")==0)
{
void gettuxing()
{
cout<<"请输入底和高：（格式为：底边长+空格+高）"<<endl;
cin>>length>>width;
}
void getarea()
{
area=length*width;
cout<<"平行四边形面积为："<<endl<<area<<endl;
}
};
class tixing:public tuxing
cout<<"请输入图形名称：（圆形、矩形、平行四边形、梯形、三角形）"
<<endl<<"图形类型: "<<endl;
cin>>name;
}
virtual void getarea()
{
}
char* getname()
{
return (char*) name;
}
};
class yuan:public tuxing
}
};
class sanjiaoxing:public tuxing
{
void gettuxing()
{
cout<<"请输入底和高："<<endl;
cin>>length>>width;
}
void getarea()
{
double area=0.5*length*width;
cout<<"所求三角形面积为："<<endl<<area<<endl;
{
public:
void gettuxing()
{
cout<<"请输入长宽：（格式为：长+空格+宽）"<<endl;
cin>>length>>width;
}
void getarea()
{Байду номын сангаас
area=length*width;
cout<<"矩形面积为："<<endl<<area<<endl;
}
};
class pxsbx:public tuxing
{
tixing B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"三角形")==0)
{
sanjiaoxing B;
b=&B;
b->gettuxing();
b->getarea();
}
goto label;
}
{
juxing B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"平行四边形")==0)
{
pxsbx B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"梯形")==0)
{
private:
double w1,w2,h;
public:
void gettuxing()
{
cout<<"请输入上底下底和高："<<endl;
cin>>w1>>w2>>h;
}
void getarea()
{
double area=0.5*(w1+w2)*h;
cout<<"所求梯形面积为："<<endl<<area<<endl;
{
private:
double r;
public:
void gettuxing()
{
cout<<"请输入半径："<<endl;
cin>>r;
}
void getarea()
{
area=r*r*4*atan(1);
cout<<"所求圆面积为："<<endl<<area<<endl;
}
};
class juxing:public tuxing
图形类
#include<iostream.h>
#include<string.h>
#include<math.h>
//定义图形类
class tuxing
{
private:
char name[50];
public:
double length,width,area;
virtual void gettuxing()
}
};
void main()
{
tuxing A,*b;
label:
A.gettuxing();
if(strcmp(A.getname(),"圆")==0)
{
yuan B;
b=&B;
b->gettuxing();
b->getarea();
}
if(strcmp(A.getname(),"矩形")==0)
{
void gettuxing()
{
cout<<"请输入底和高：（格式为：底边长+空格+高）"<<endl;
cin>>length>>width;
}
void getarea()
{
area=length*width;
cout<<"平行四边形面积为："<<endl<<area<<endl;
}
};
class tixing:public tuxing