C++ 加号运算符重载

偷偷拿来记录一下萌新的cs路——day 29

成员函数重载方式

#include
using namespace std;

// 加号运算符重载：两自定义数据类型相加的运算
class Person {
public:
	// 成员函数重载+
	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;
};


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);
	Person p3 = p1 + p2;

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

int main() {
	test01();
	return 0;
}

运行结果

全局函数重载方式 

#include
using namespace std;

// 加号运算符重载：两自定义数据类型相加的运算
class Person {
public:
	int m_A;
	int m_B;
};

// 全局函数重载+
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;
}

// 函数重载的版本
Person operator+(Person& p1, int num) {
	Person temp;
	temp.m_A = p1.m_A + num;
	temp.m_B = p1.m_B + num;
	return temp;
}

void test01() {
	Person p1;
	p1.m_A = 10;
	p1.m_B = 10;
	Person p2;
	p2.m_A = 10;
	p2.m_B = 10;
	// 全局函数重载本质调用
	Person p3 = operator+(p1, p2);
	// 函数重载版本
	Person p4 = p1 + 100;
	//Person p3 = p1 + p2;

	cout << "p3.m_A = " << p3.m_A << endl;
	cout << "p3.m_B = " << p3.m_B << endl;
	cout << "p4.m_A = " << p4.m_A << endl;
	cout << "p4.m_B = " << p4.m_B << endl;
}

int main() {
	test01();
	return 0;
}

运行结果

学了更多知识还会回来更新的，有误之处恳请大佬指正，提前感谢！