C++对象缺省函数

#include <iostream>

#include <string>

using namespace std;

class CTestPlus{

public:

CTestPlus(){

m =0;

p=new int(100);

}

~CTestPlus(){delete p;}

CTestPlus(const CTestPlus& a) //拷贝构造函数

{

m = a.m;

p = new int;

*p = *(a.p);

}

CTestPlus& operator=(const CTestPlus& a) //赋值函数

{

m = a.m;

p = new int;

*p = *(a.p);

return *this;

}

void output(CTestPlus &a)

{

cout<<"a.m ="<<a.m<<endl;

cout<<"a.p ="<<*(a.p)<<endl;

}

private:

int m;

int *p;

};

#include "CTestPlus.h"

int main()

{

CTestPlus ctest;

CTestPlus A = ctest;

ctest.output(A);

//cout<<"A.m ="<<A.m;

CTestPlus c;

c =A;

ctest.output(c);

int wait;

cin>>wait;

}