追踪对象的追踪类的设计

#include

using namespace std;

class ObjTrace{//追踪对象的类

private:

static int count;//静态数据成员，属于类本身不属于对象

int ct;//对象的编号

public:

ObjTrace():ct(++count){cout<<"Object"<<ct<<"constructed"<<endl;}

~ObjTrace(){cout<<"Object"<<ct<<"destroyed"<<endl;}

ObjTrace(const ObjTrace&obj):ct(++count){cout<<"Object"<<ct<<"constructed"<<endl;}

ObjTrace& operator=(const ObjTrace obj){return*this;}

};

int ObjTrace::count=0;//静态数据成员的初始化

class Point{

private:

ObjTrace objtr;//引用ObjTrace对象，即使用ObjTrace的方式

int x,y;

public:

Point(int a,int b):x(a),y(b){}

Point(const Point&obj):objtr(obj.objtr),x(obj.x),y(obj.y){}

Point& operator=(const Point& obj)

{

objtr=obj.objtr;

x=obj.x;

y=obj.y;

return *this;

}

~Point(){}

};

int main()

{

Pointpt[3]={Point(1,2),Point(3,4),Point(5,6)};//对象数组及其初始化方式

Point p1=pt[0];

Point p2=pt[1];

p1=p2;

return 1;

}