封闭类对象的创建与消亡

封闭类对象的创建与消亡p127

#include <iostream>
using namespace std;
class CTyre //轮胎类
{
private:
	int radius; // 半径
	int width; // 宽度
public:
	CTyre() :radius(16), width(185)
	{
		cout << radius << "\tCTyre 构造函数" << endl;
	}
	CTyre(int r, int w) :radius(r), width(w)
	{
		cout << radius << "\tCTyre构造函数" << endl;
	}
	~CTyre()
	{
		cout << radius << "\tCTyre 析构函数" << endl;
	}
	int getRadius()
	{
		return radius;
	}
	int getWidth()
	{
		return width;
	}
};
class CCar //汽车类
{
private:
	int price;
	CTyre tyre;
public:
	CCar();
	CCar(int p, int tr, int tw);
	~CCar();
	int getPrice()
	{
		return price;
	}
	CTyre getCTyre()
	{
		return tyre;
	}
};
CCar::CCar()
{
	price = 50010; CTyre(); cout << price << "\tCCar 构造函数 " << endl;
}
CCar::CCar(int p, int tr, int tw) :price(p), tyre(tr, tw) {
	cout << price << "\tCCar 析构函数" << endl;
}
CCar::~CCar()
{
	cout << price << "\tCCar 析构函数" << endl;
}
int main()
{
	CCar car(48900, 17, 225);
	cout << "price=" << car.getPrice()
		<< "\tCTyre.Radius=" << car.getCTyre().getRadius()
		<< "\tCTyre.Width=" << car.getCTyre().getWidth() << endl;
	CCar car1;
	cout << "price=" << car1.getPrice()
		<< "\tCTyre.Radius=" << car1.getCTyre().getRadius()
		<< "\tCTyre.Width=" << car1.getCTyre().getWidth() << endl;
	return 0;

}

运行结果：