C++ 赋值运算符重载

类的定义

class Test{

	int id;

public:

	Test(int i): id(i){

		cout << "obj_" << i << " created" << endl;

	}

	Test& operator= (const Test& right){

		if (this == &right){

			cout << "same object." << endl;

		} else {

			cout << "success." << endl;

			this->id = right.id;

		}

		return *this;

	}

	void print(){

		cout << id << endl;

	}

};

主函数

int main(){

	Test a(1), b(2);

	cout << "a = a: ";

	a = a;

	a.print();

	cout << "a = b: ";

	a = b;

	a.print();

	return 0;

}

结果

obj_1 created

obj_2 created

a = a: same object.

1

a = b: success.

2

巴特西

C++ 赋值运算符重载

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