qingqing1.cpp

几何体的体积表面积计算

#include"iostream.h"
#include"math.h"
class circle //圆类的定义（抽象类）
{private:
     float f_mr;
 public:	  
    circle()//构造函数;
	 {f_mr=0;
	 }
	 ~circle()//构析函数
	 {cout<<" now destory the object of circle!"<<endl;
	 }
    virtual   float area(float r)=0;//纯虚函数
	virtual float volume(float r)=0;//纯虚函数
};




class yuanzhu:public circle//定义圆柱类；
{private:
	float f_mh1;

 public:
	yuanzhu(float r,float h1):circle()//构造函数;
	 {f_mh1=0;
	  
	 }
  ~yuanzhu()//构析函数
 	{cout<<"yuanzhu类对象已被撤消"<<endl;
	}
    float area(float r,float h1);
	float volume(float r,float h1);
};
float yuanzhu::area(float r,float h1)
{return 2*3.14*r*r+2*3.14*r*h1;
}
float yuanzhu::volume(float r,float h1)
{return 3.14*r*r*h1;
} 



class zhui:public circle//定义圆锥类；
{private:
	float f_mh2;
public:
	zhui()//构造函数;
	{f_mh2=0;
	}
	~zhui()//构析函数
    {cout<<"now destroying the object of zhui!"<<endl;
	}
    float area(float r,float h2);
	float volume(float r,float h2);

};
float zhui::area(float r,float h2)
{return 3.14*r*r+3.14*r*sqrt(r*r+h2*h2);
}
float zhui::volume(float r,float h2)
{return (1.0/3.0)*3.14*r*r*h2;
}



void main()
{float r,h1,h2;
 cout<<"请输入圆的半径、圆柱的高、圆锥的高:"<<endl;
 cin>>r>>h1>>h2;
 yuanzhu *y;
 zhui *z;
 cout<<"圆柱的表面积："<<y->area(r,h1)<<endl;
 cout<<"圆柱的体积："<<y->volume(r,h1)<<endl;
 cout<<"圆锥的表面积："<<z->area(r,h2)<<endl;
 cout<<"圆锥的体积："<<z->volume(r,h2)<<endl;
}