C++qiujieda

Question

 

Answer 1

代码如下：

#include <iostream>
using namespace std;
const double PI = (float)3.14159;
class Shape
{
public:
	virtual double Biaomj() = 0;
	virtual double Tiji() = 0;
};
//球体
class Sphere:public Shape
{
private:
	double radius;  //半径
public:
	Sphere(double r):radius(r){}
	double Biaomj()
	{
		return 4 * PI * radius * radius;
	}
	double Tiji()
	{
		return 4.0/3 * PI * radius * radius * radius;
	}
	double GetRadius(){return radius;}
};

class Cube : public Shape
{
private:
	double length;
public:
	Cube(double l):length(l){}
	double Biaomj()
	{
		return 6.0 * length * length;
	}
	double Tiji()
	{
		return length * length * length;
	}
	double GetLen(){return length;}
};

int main()
{
	Sphere cir(2);
	Cube cb(4);
	cout << "半径为"<< cir.GetRadius() << "的球的表面积为:" << cir.Biaomj() << ",体积为: " << cir.Tiji() <<endl;
	cout << "长为" << cb.GetLen() << "的立方体的表面积为:" << cb.Biaomj() << ",体积为:" << cb.Tiji() << endl;
	return 0;
}