C++赋值运算符重载(2)

#include "public.h"
using namespace std;

class A {
private:
	int n;
public:
	A(int n):n(n) {}
	A(const A& a) {
		n = a.n;
		cout << "拷贝构造" << endl;
	}
	//A operator = (const A& a);
	A& operator = (const A& a);
	void show() { cout << "n: " << n << endl; }
};

//A A::operator=(const A& a) {
//	this->n = a.n;
//	cout << "赋值运算符重载" << endl;
//	return *this;	//返回的是值
//}

A& A::operator = (const A & a) {
	this->n = a.n;
	cout << "赋值运算符重载" << endl;
	return *this;	//返回的是值

}
int main(int argc, const char* argv[]) {

	A a(1), b(2);
	A c = a;		

	int n, m, i, k;
	n = m = i = k = 666;

	(k = 666) = 1;
	cout << k << endl;

	(a = b) = c;
	a.show();


	while (1);
	return 0;
}