Cpp-learning/运算符重载1/2、左移运算符重载.cpp

//4.5.2    左移运算符重载

//作用 : 可以输出自定义数据类型

#if(0)

#include <iostream>


class Person
{
public:
	Person(int a , int b)
	{
		m_A = a;
		m_B = b;
	}

	friend std::ostream& operator<<(std::ostream& cout, Person& p);


	//利用成员函数重载 左移运算符  p.operator<<(cout)  简化版本  p << cout
	//不会利用成员函数重载<<运算符，因为无法实现 cout 在左侧

	//void operator<< (cout)
	//{

	//}

private:
	int m_A;
	int m_B;
};

//只能利用全局函数重载左移运算符
std::ostream& operator<<(std::ostream &cout , Person &p)       //本质  operator<< (cout,p)  简化 cout << p
{
	std::cout << "m_A = " << p.m_A << " m_B = " << p.m_B;

	return cout;
}


void test01()
{
	Person p(10,10);
	//p.m_A = 10;
	//p.m_B = 10;

	std::cout << p << std::endl;
}

int main()
{
	test01();

	system("pause");

	return 0;
}

#endif