C++——加号运算符重载

 运算符重载概念:对已有的运算符进行定义,赋予其另一种功能,以适应不同的数据类型

加号运算符重载作用:实现两个自定义数据类型进行相加的运算

实例:

#include
using namespace std;
#include

//加号运算符重载

class Person {
public:
	//1.成员函数重载 +号
	/*Person operator+(Person& p)
	{
		Person temp;
		temp.m_A = this->m_A + p.m_A;
		temp.m_B = this->m_B + p.m_B;
		return temp;
	}*/

	int m_A;
	int m_B;

};

//2.全局函数重载 +号
Person operator+(Person&p1, Person& p2)
{
	Person temp;
	temp.m_A = p1.m_A + p2.m_A;
	temp.m_B = p1.m_B + p2.m_B;
	return temp;
}

void test01()
{
	Person p1;
	p1.m_A = 10;
	p1.m_B = 10;
	Person p2;
	p2.m_A = 10;
	p2.m_B = 10;

	//成员函数重载本质调用
	//Person p3 = p1.operator+(p2);

	//全局函数重载本质调用
	Person p3 = operator+(p1,p2);

	Person p3 = p1 + p2;

	cout << "p3.m_A=" << p3.m_A << endl;
	cout << "p3.m_B=" << p3.m_B << endl;

	//运算符重载也可以发生函数重载
}

int main()
{
	test01();

	system("pause");

	return 0;

}

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