C++ 重载操作符+

重载操作符+

1、成员函数实现“+”号运算符重载

class Person
{
    
    
public:
	Person(){
    
    };   //切记这里要加{}
	Person(int a, int b)
	{
    
    
		this->m_A = a;
		this->m_B = b;
	}

	//成员函数实现“+”号运算符重载
	Person operator+ (const Person& p)
	{
    
    
		Person temp;
		temp.m_A = this->m_A + p.m_A;
		temp.m_B = this->m_B + p.m_B;
		return temp;
	}

public:
	int m_A;
	int m_B;
};

2、全局函数实现“+”号运算符重载

Person operator+ (const Person& p1, const Person& p2)
{
    
    
	Person temp(0, 0);

	temp.m_A = p1.m_A + p2.m_A;
	temp.m_B = p1.m_B + p2.m_B;

	return temp;
}

3、运算符重载可以发生函数重载

Person operator+(const Person& p2, int val)
{
    
    
	Person temp;
	temp.m_A = p2.m_A + val;
	temp.m_B = p2.m_B + val;

	return temp;
}

4、测试

Person p1(10, 20);
	Person p2(20, 40);
	Person p3=p1+p2;
	//Person p3 = p2 + 10;
	cout << "p3的m_A为： " << p3.m_A << endl;
	cout << "p3的m_B为： " << p3.m_B << endl;

5、运行结果

p3的m_A为： 30
p3的m_B为： 60
请按任意键继续. . .