qiujieda！。。

Question

 

Answer 1

代码如下

#include <iostream>
using namespace std;
const float PI = 3.1415;
class container
{
protected:
	double radius;
public:
	container(double radius1){radius = radius1;};
	virtual double surface_area() = 0;
	virtual double volume()=0;
};

class cube :public container
{
public:
	cube(double r):container(r){}
	double surface_area()
	{
		return 6 * radius * radius;
	}
	double volume()
	{
		return radius * radius * radius;
	}
};

class sphere :public container
{
public:
	sphere(double r):container(r){}
	double surface_area()
	{
		return 4* PI * radius * radius;
	}
	double volume()
	{
		return 4*PI*radius * radius * radius/3;
	}
};

class cylinder :public container
{
private:
	double height;
public:
	cylinder(double r,double h):container(r){height = h;}
	double surface_area()
	{
		return 2* PI * radius * (radius+height);
	}
	double volume()
	{
		return PI*radius * radius * height;
	}
};

int main()
{
	cube cu(6.0);
	sphere sp(5.0);
	cylinder cy(6.0,5.0);
	cout << "边长为6.0的正方体的表面积 = " << cu.surface_area() << ",体积 = " << cu.volume() << endl;
	cout << "半径为5.0的球体的表面积 = " << sp.surface_area() << ",体积 = " << sp.volume() << endl;
	cout << "半径为5.0和高为6.0的圆柱体的表面积 = " << cy.surface_area() << ",体积 = " << cy.volume() << endl;

	return 0;
}