열혈c++ 문제 4-1 , 4-2

#include <iostream>
using namespace std;

class Fruitseller
{
private:
	int APPLE_PRICE;
	int numOfApples;
	int myMoney;

public:
	void InitMembers(int price, int num, int money)
	{
		APPLE_PRICE = price;
		numOfApples = num;
		myMoney = money;
	}
	int SaleApples(int money)
	{
		if (money < 0)
		{
			cout << "잘못된 정보가 전달되어 판매를 취소합니다." << endl;
			return 0;
		}
		int num = money / APPLE_PRICE;
		numOfApples -= num;
		myMoney += money;
		return num;
	}
	void ShowSalesResult()const
	{
		cout << "남은사과:" << numOfApples << endl;
		cout << "판매수익: " << myMoney << endl << endl;
	}
};
class FruitBuyer
{
private:
	int myMoney;
	int numOfApples;
public:
	void InitMembers(int money)
	{
		myMoney = money;
		numOfApples = 0;
	}
	void BuyApples(Fruitseller& seller, int money)
	{
		if (money < 0)
		{
			cout << "잘못된 정보가 전달되어 구매를 취소합니다." << endl;
			return;
		}
		numOfApples += seller.SaleApples(money);
		myMoney -= money;
	}
	void ShowBuyResult()const
	{
		cout << "현재 잔액: " << myMoney << endl;
		cout << "사과 개수: " << numOfApples << endl << endl;
	}
};
int main()
{
	Fruitseller seller;
	seller.InitMembers(1000, 20, 0);
	FruitBuyer buyer;
	buyer.InitMembers(5000);
	buyer.BuyApples(seller, 2000);

	cout << "과일판매자의 현황" << endl;
	seller.ShowSalesResult();
	cout << "과일구매자의 현황" << endl;
	buyer.ShowBuyResult();

	return 0;
}

4-2

#include <iostream>
using namespace std;

class Point
{
private:
	int xpos, ypos;
public:
	void Init(int x, int y)
	{
		xpos = x;
		ypos = y;
	}
	void ShowPointInfo()const
	{
		cout << "[" << xpos << "," << ypos << "]" << endl;
	}
};

class Circle
{
	private:
		int  rad;
		Point center;
	public:
		void Init(int x, int y,int r)
		{
			rad = r;
			center.Init(x, y);
		}

		void ShowCircleInfo()const
		{
			cout << "radius: " << rad << endl;
			center.ShowPointInfo();
		}
};
class Ring
{
private:
	Circle inCircle;
	Circle outCircle;
public:
	void Init(int inx, int iny, int inr, int outx, int outy, int outr)
	{
		inCircle.Init(inx,iny,inr);
		outCircle.Init(outx, outy, outr);
	}
	void ShowRingInfo()const
	{
		cout << "Inner Circle Info..." << endl;
		inCircle.ShowCircleInfo();
		cout << "Cuter Circle Info..." << endl;
		outCircle.ShowCircleInfo();

	}
};

int main()
{
	Ring ring;
	ring.Init(1, 1, 4, 2, 2, 9);
	ring.ShowRingInfo();
	return 0;
}