C++二目运算符重载

来源：互联网发布：跳跃表c语言编辑：程序博客网时间：2024/05/16 11:09
/*======================================================================模板：1、模板函数 <-----> 模板类|v标准模板类2、友元函数友元类3、静态成员函数静态数据成员4、运算符重载========================================================================运算符重载二元运算符重载+号运算符 成员函数重载传入一个参数作为第二个参数  第一个参数默认是当前对象的参数输出运算符  第一个参数必须是ostream 所以不能是默认的对象参数 不能使用成员函数进行重载[]索引运算符  不能使用友元函数重载 因为第一个参数必须是当前对象的this指针。=======================================================================*/#include <iostream>#include <string>using namespace std;class Coordinate{public:friend Coordinate operator ^ (Coordinate &coor1, Coordinate &coor2);friend ostream &operator<<(ostream &c1, Coordinate &c2);Coordinate(int x, int y){m_iX = x;m_iY = y;}//这里传入参数最好是引用 如果用指针的话 调用的时候+后面的对象要进行取地址Coordinate operator+(Coordinate &coor){Coordinate temp(0,0);temp.m_iX = this->m_iX + coor.m_iX;temp.m_iY = this->m_iY + coor.m_iY;return temp;}int operator[](int index){if (index == 0)return this->m_iX;if (index == 1)return this->m_iY;elsethrow string("未索引到！");}void print(){cout << m_iX << "" << m_iY << endl;}private:int m_iX;int m_iY;};ostream &operator<<(ostream &c1, Coordinate &c2){c1 << c2.m_iX << "  " << c2.m_iY << endl;return c1;}Coordinate operator ^(Coordinate &coor1, Coordinate &coor2){Coordinate temp(1, 1);for (size_t i = 0; i < coor2.m_iX;i++)temp.m_iX = coor1.m_iX*temp.m_iX;for (size_t i = 0; i < coor2.m_iY; i++)temp.m_iY = coor1.m_iY*temp.m_iY;return temp;}int main(){Coordinate coor1(4, 2),coor2(5,6);Coordinate coor3 = coor1 ^ coor2;//coor3.print();cout << coor3;//相当于写成了operator<<(cout,coor3);try{cout << coor3[2] << endl;}catch(string s){cout << s << endl;}}
0 0