c++7

1.运算符重载

   

#include<iostream>using namespace std;class Complex{public:int a;int b;Complex(int a = 0,int b=0){this->a = a;this->b = b;}void printCom(){cout << a << "+" << b << "i" << endl;}protected:private:};Complex myAdd(Complex &c1,Complex &c2){Complex tmp(c1.a + c2.a, c1.b+c2.b);return tmp;}Complex operator+(Complex &c1, Complex &c2){Complex tmp(c1.a + c2.a, c1.b + c2.b);return tmp;}void main(){int a = 0, b = 0;int c;c = a + b;//基础数据类型，编译器知道如何运行Complex c1(1, 2), c2(3, 4);//Complex c3;//c3 = c2 + c1;//用户自定义的数据类型，编译器不知道如何运算Complex c4 = c1 + c2;c4.printCom();cout << "hello.." << endl;system("pause");return;}