c++ 复数类

# pragma once//头文件

class Complex
{
public:
	Complex(double Real = 0, double Imag = 0);//构造函数
	~Complex();
	Complex& operator =(Complex& Num);//拷贝	
	Complex operator +(const Complex& Num);//复数加法
	Complex operator -(const Complex& Num);//复数减法
	Complex operator *(const Complex& Num);//复数乘法
	Complex operator /(const Complex& Num);//复数除法
	Complex& operator +=(const Complex& Num);
	bool operator > (const Complex& Num);//大于

	bool operator <=(const Complex& Num);//小 等

	void Print_Complex();//打印复数
private:
	double _real;//实部
	double _imag;//虚部

};

#include<iostream>//函数文件
#include"complex.h"
using namespace std;

Complex::Complex(double Real , double Imag )//构造函数
{
	_real = Real;
	_imag = Imag;
}
Complex::~Complex()
{

}
Complex& Complex:: operator=(Complex& Num)//拷贝构造
{

	_real = Num._real;
	_imag = Num._imag;
	return *this;
}

Complex Complex:: operator +(const Complex& Num)//复数加法
{
	Complex tmp;
	tmp._real = _real + Num._real;
	tmp._imag = _imag + Num._imag;
	return tmp;
}
Complex Complex:: operator -(const Complex& Num)//复数减法
{
	Complex tmp;
	tmp._real = _real - Num._real;
	tmp._imag = _imag - Num._imag;
	return tmp;
}
Complex Complex::operator *(const Complex& Num)//复数乘法
{
	double tmpReal = this->_real;
	double tmpImag = this->_imag;
	Complex tmp;
	tmp._real = _real *Num._real - _imag *Num._imag ;
	tmp._imag = tmpImag* Num._real + tmpReal* Num._imag;
	return tmp;
}
Complex Complex:: operator /(const Complex& Num)//复数除法
{
	if (Num._imag == 0 && Num._real == 0)
		exit(-1);
	double tmpReal = this->_real;
	double tmpImag = this->_imag;
	Complex tmp;
	tmp._real = (_real *Num._real + _imag *Num._imag) / (Num._imag*Num._imag + Num._real*Num._real);
	tmp._imag = (tmpImag* Num._real - tmpReal* Num._imag) / (Num._imag*Num._imag + Num._real*Num._real);
	return tmp;
}
Complex& Complex::operator +=(const Complex& Num)
{
	_real = _real + Num._real;
	_imag = _imag + Num._imag;
	return *this;
}


void Complex::Print_Complex()//打印复数
{
	if (this->_imag)
		cout <<this->_real << "+" << this->_imag << "i" << endl;
	else
		cout << this->_real << endl;
}

bool Complex::operator > (const Complex& num)
{
	return (_real*_real + _imag*_imag )>( num._real*num._real + num._imag*num._imag);

}

bool Complex::operator <=(const Complex& num)
{
	return !(*this > num);

}

#include<iostream>//主函数测试函数

#include"complex.h"

using namespace std;

void test1()
{
	Complex com1(1, 2);
	Complex com2(3, 4);
	Complex com3(1, 1);
	com3 = com1 - com2;
	com3.Print_Complex();
    com3 = com1 + com2;
	com3.Print_Complex();
	com3 = com1*com2;
	com3.Print_Complex();
	com3 = com1 / com2;//(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i
	com3.Print_Complex();
}

int main()
{
	test1();
	return 0;
}

c++ 复数类

原文：http://shaungqiran.blog.51cto.com/10532904/1713434