复制构造函数--赋值构造函数 举例

#include <iostream>
using namespace std;

class ABC{
private:
int m_i;
void * m_p;
public:
    ABC(){};
    ABC(void*p):m_p(p){cout<<"构造ABC2="<<p<<endl;};
};


class Test
{
public:
Test();
~Test();
Test(const Test& t);
Test& operator=(const Test& t);
private:
int t1;
public:
ABC m_abc;
};

Test::Test():m_abc(this)
{
cout<<"调用构造函数"<<this<<endl;
}

Test::~Test()
{
cout<<"调用析构函数"<<endl;
}

Test::Test(const Test& t)
{
cout<<"调用复制构造函数"<<endl;
}

Test& Test::operator =(const Test& t)
{
cout<<"调用赋值构造函数"<<endl;
t1 = t.t1;
return *this;
}

int main()
{
Test t1;
Test t2 = t1;
//Test t3;
//t3 = t1;
    return 0;
}