#include "stdafx.h"
#include <iostream>#include <string> /*重载运算符，选择成员还是非成员实现？1 赋值(=), 下标([]), 调用(()), 成员访问箭头(->)操作符必须定义为成员2 复合赋值操作符( +=, -=, *=, \=, %=, &=, ^=, |= , <<=, >>=) 一般定义为类的成员，但不是必须这么做，也可以定义为非成员3 自增，(++)，自减(--)和解引用(*)一般会定义为类成员4 算术运算符(+, -, *, /, %, ),相等操作符( == )，关系操作符(>, < , >=, <=,)，位操作符（&， ^, |, !)，一般定义为非成员实现。*/namespace operator_test
{class CObject
{ friend std::ostream& operator<<(std::ostream& out, const CObject& obj); public: CObject(int a) : m_a(a) {}
int Get()
{ return m_a; }CObject& operator=(CObject& obj)
{ this->m_a = obj.Get(); return *this; //赋值运算符重载必须返回 *this }CObject& operator=(int obj)
{ this->m_a = obj; return *this; //赋值运算符重载必须返回 *this }CObject& operator++()
{ this->m_a++; return *this; }CObject operator++(int)
{ // //因为是后缀，所以必须要返回一个副本 // CObject newObj = CObject(this->m_a); this->m_a++; return newObj; }private:
int m_a; };CObject operator+(CObject& obj1, CObject& obj2)
{ return CObject(obj1.Get() + obj2.Get()); }CObject operator*(CObject& obj1, CObject& obj2)
{ return CObject(obj1.Get()*obj2.Get()); }bool operator==(CObject& obj1, CObject& obj2)
{ return (obj1.Get() == obj2.Get()); } bool operator!=(CObject& obj1, CObject& obj2) { return !(obj1.Get() == obj2.Get()); }std::ostream& operator<<(std::ostream& out, const CObject& obj)
{ out << obj.m_a; return out; }}void test_operator_test()
{ operator_test::CObject obj1(10); operator_test::CObject obj2(20);//
//重载算术运算符 // operator_test::CObject add = obj1 + obj2; std::cout << add << std::endl;operator_test::CObject muil = obj1*obj2;
std::cout << muil << std::endl;//
//重载相等运算符 // if(obj1 == obj2) { std::cout << "obj1 == obj2" << std::endl; }else { std::cout << "obj1 != obj2" << std::endl; }//
//重载赋值操作符. // operator_test::CObject newObject = obj1; std::cout << newObject << std::endl;//
//自增操作符++( 自减原理一样 )重载 // std::cout << newObject++ << std::endl; std::cout << newObject << std::endl;newObject = 10;
std::cout << ++newObject << std::endl;std::cout << "---------------------------" << std::endl;
}