p8_3.cpp

相当丰富的C++源码

/************************************
* p8_3.cpp                         *
* 多层继承的构造函数与析构函数     *
************************************/
#include<iostream>
using namespace std;
class Point
{
private:
	int X,Y;
public:
	Point(int X=0,int Y=0)
	{    
       this->X=X,this->Y=Y;
	   cout<<"point("<<X<<","<<Y<<") constructing..."<<endl;
	}
	~Point()
	{
		cout<<"point("<<X<<","<<Y<<") destructing..."<<endl;
	}
};
class Circle :protected Point
{
protected:
	double radius;   //半径
public:
	Circle(double R=0,int X=0, int Y=0):Point(X,Y)
	{	
		radius=R;
		cout<<"circle constructing, radius:"<<R<<endl;
	}
	~Circle()
	{	
		cout<<"circle destructing, radius:"<<radius<<endl;
	}
};
class tube: protected Circle
{
private:
	double height;
    Circle InCircle;
public:
    tube(double H,double R1, double R2=0, int X=0, int Y=0 ):InCircle(R2,X,Y),Circle(R1,X,Y)
	{  
		height=H;      
		cout<<"tube constructing, height:"<<H<<endl;
	}
    ~tube()
	{  
		cout<<"tube destructing, height:"<<height<<endl;
	}
};
void main() 
{
    tube TU(100,20,5);
}