C++官方文档-this

#include <iostream>
using namespace std;class Dummy
{
public:int x;Dummy(): x(0){};Dummy(int xx): x(xx){};bool isitem(Dummy const&);Dummy& operator=(Dummy const& param);
};
bool Dummy::isitem(Dummy const& param)
{if(this == &param)return true;return false;
}
Dummy& Dummy::operator=(const Dummy& param)
{this->x = param.x;cout << "=" << endl;//this指向等号左边的对象return *this;
}int main()
{Dummy a;Dummy* b = &a;if(b->isitem(a))cout << true << endl;elsecout << false << endl;Dummy foo(3);Dummy bar;//声明一个对象,然后把foo赋值给它
//    Dummy bar=foo;//调用重载函数=
//    bar.operator =(foo);//调用重载函数=bar = foo;cout << bar.x << endl;cout << bar.isitem(foo) << endl;cout << bar.isitem(bar) << endl;return 0;
}