第五次实验参考代码

代码比我们实验的要求要多一些，大家仔细看下

#include <iostream.h>
#include <math.h>

const double PI=3.14;

class Geometric_shape{
public:
	Geometric_shape()
	{
	}
	virtual double Get_Girth()=0;  //Öܳ¤
	virtual double Get_Area()=0;   //Ãæ»ý
	virtual double Get_Volume()=0; //Ìå»ý
	virtual double Get_SurArea()=0; //±íÃæ»ý
	virtual void print()=0;
};

class Rectangle:public Geometric_shape{
protected:
	double length,width;
public:
	Rectangle(double l,double w):length(l),width(w){}
	double Get_Girth()
	{
		return 2 * (width + length);
	}
	double Get_Area()
	{
		return width * length;
	}
	virtual double Get_Volume()
	{
		return 0.0;
	}
	virtual double Get_SurArea()
	{
		return 0.0;
	}
	void print()
	{
		cout<<"The Rectangle's Girth is:"<<Get_Girth()<<endl;
		cout<<"The Rectangle's Area is:"<<Get_Area()<<endl;
	}
};

class Circle:public Geometric_shape{
protected:
	double radius;
public:
	Circle(double l):Geometric_shape(),radius(l){}
	double Get_Girth()
	{
		return 2 * PI * radius;
	}
	double Get_Area()
	{
		return PI * radius * radius;
	}
	virtual double Get_Volume()
	{
		return 0.0;
	}
	virtual double Get_SurArea()
	{
		return 0.0;
	}
	void print()
	{
		cout<<"The Circle's Girth is:"<<Get_Girth()<<endl;
		cout<<"The Circle's Area is:"<<Get_Area()<<endl;
	}
};

class Triangle:public Geometric_shape{
protected:
	double len1,len2,len3;
public:
	Triangle(double a,double b,double c)
	{
		len1 = a;
		len2 = b;
		len3 = c;
	}
	double Get_Girth()
	{
		return len1 + len2 + len3;
	}
	double Get_Area()
	{
		double p = Get_Girth() / 2;
		return sqrt(p * (p - len1) * (p - len2) * (p - len3));
	}
	virtual double Get_Volume()
	{
		return 0.0;
	}
	virtual double Get_SurArea()
	{
		return 0.0;
	}
	void print()
	{
		cout<<"The Triangle's Grith is:"<<Get_Girth()<<endl;
		cout<<"The Triangle's Area is:"<<Get_Area()<<endl;
	}
};

class Box:public Rectangle{
protected:
	double height;
public:
	Box(double l,double w,double h):Rectangle(l,w),height(h){}
	double Get_SurArea()
	{
		return 2 * (length * width + width * height + height * length);
	}
	double Get_Volume()
	{
		return length * width * height;
	}
	void print()
	{
		cout<<"The Box's SurArea is:"<<Get_SurArea()<<endl;
		cout<<"The Box's volume is:"<<Get_Volume()<<endl;
	}
};

class Column:public Circle{
private:
	double height;
public:
	Column(double l,double h):Circle(l),height(h){}
	double Get_SurArea()
	{
		double a;
		a = 2 * Get_Area() + 2 * PI * radius * height;
		return a;
	}
	double Get_Volume()
	{
		return Get_Area() * height;
	}
	void print()
	{
		cout<<"The Cylinder's SurArea is:"<<Get_SurArea()<<endl;
		cout<<"The Cylinder's Volume is:"<<Get_Volume()<<endl;
	}
};

class Ball:public Circle{
public:
	Ball(double l):Circle(l){}
	double Get_SurArea()
	{
		return 4.0 * Get_Area();
	}
	double Get_Volume()
	{
		return 4.0 * Get_Area() * radius /3.0;
	}
	void print()
	{
		cout<<"The Cone's SurArea is:"<<Get_SurArea()<<endl;
		cout<<"The Cone's Volume is:"<<Get_Volume()<<endl;
	}
};

void fun(Geometric_shape &p)
{
	p.print();
}


void main()
{
	Circle c(2.5);
	fun(c);
	Rectangle r(2.4,3.6);
	fun(c);
	Ball b(3.5);
	fun(b);
	Column co(3.5,5.3);
	fun(co);
	Triangle t(2.3,4.2,3.4);
	fun(t);
	Box bo(3,5.2,3.6);
	fun(bo);
}