c++ 复数类

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测试而已，不完整。
complex.h

#ifndef _COMPLEX_H#define _COMPLEX_Hclass complex{    public://构造函数        complex():_real(0),_imag(0){}        complex(double real):_real(real),_imag(0){}        complex(double real,double imag):_real(real),_imag(imag){}    public://设置和获取实部和虚部的值        double GetReal() const{return _real;}//获取实部的值        double GetImag() const{return _imag;}//获取虚部的值        void   SetReal(double real);  //更改实部的值        void   SetImag(double imag);  //更改虚部的值        void   SetVal(double real,double imag); //更改整个复数    public:             friend complex  operator+(const complex &lhs,const complex &rhs);//      complex&    operator+ (const complex &val);        complex&    operator* (const complex &val);        complex&    operator+=(const complex &val);                                 complex&    operator*=(const complex &val);                                   friend bool operator==(const complex &lhs,const complex &rhs);        friend bool operator!=(const complex &lhs,const complex &rhs);    private:        double _real;//实部        double _imag;//虚部};#endif

complex.cpp

#include <stdafx.h>#include "complex.h"void   complex::SetReal(double real){    _real = real;}   void   complex::SetImag(double imag)   {    _imag = imag;}  void   complex::SetVal(double real,double imag){    _real = real;    _imag = imag;}/////////////////////////// complex operator+ (const complex &lhs,const complex &rhs){     return complex(lhs._real+rhs._real,lhs._imag+rhs._imag);  }complex&    complex::operator* (const complex &val){    complex temp(*this);      temp *= val;      return temp;}complex&    complex::operator+=(const complex &val){    _real += val._real;    _imag += val._imag;    return *this;}complex&    complex::operator*=(const complex &val){    double retReal = _real;    double retImag = _imag;    _real = retReal*val._real - retImag*val._imag;    _imag = retReal*val._imag + retImag*val._real;    return *this;}bool operator==(const complex &lhs,const complex &rhs){    return (lhs._real == rhs._real) && (lhs._imag == rhs._imag);}bool operator!=(const complex &lhs,const complex &rhs){    return !(lhs==rhs);}

标准库提供的复数类是一个模板。

template<class T>class complex{    public:        complex(T re,T im);        //......};

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