main.cpp

this a good book.

#include <iostream>

#define PI 3.1416

using namespace std;

class CPlanet
{
protected:
	double distance;
	int    revolve;
public:
	CPlanet(double distance,int revolve)
	{
	//* * 1 * *
	
	}
};
//* * 2 * *
class CEarth
{
private:
	double circum;
public:
	//* * 3 * *
	CEarth(double d,int r)
	{
		circum = 2*d*PI;
	}
	//* * 4 * *
	{
		cout<<"周长="<<circum<<endl;
		cout<<"距太阳距离="<<distance<<endl;
		cout<<"公转周期="<<revolve<<endl;
	}
};
void main()
{
	CEarth obj(9300000,365);
	obj.show();
	return;
}