负数中的运算付重载（1)

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*文件名称：test.cpp

*作者：韩双志

*完成日期：2016年5月23日

*版本号：v1.0

*问题描述：请用类的成员函数，定义复数类重载运算符+、-、*、/，使之能用于复数的加减乘除

*输入描述：无；

*输出描述：输出加，减，乘，除，后的结果

#include<iostream>
#include<Cmath>
using namespace std;
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r; imag=i;}
    Complex operator+(const Complex &c2);
    Complex operator-(const Complex &c2);
    Complex operator*(const Complex &c2);
    Complex operator/(const Complex &c2);
    void display();
private:
    double real;
    double imag;
};
Complex Complex::operator+(const Complex &c2)
{
    Complex c;
    c.real=real+c2.real;
    c.imag=imag+c2.imag;
    return c;
}
Complex Complex::operator-(const Complex &c2)
{
    Complex c;
    c.real=real-c2.real;
   c.imag=imag-c2.imag;
    return c;

}
Complex Complex::operator*(const Complex &c2)
{
    Complex c;
    c.real=real*c2.real-imag*c2.imag;
    c.imag=imag*c2.real+real*c2.imag;
    return c;
}
Complex Complex::operator/(const Complex &c2)
{
    Complex c;
    c.real=(real*c2.real+imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    c.imag=(imag*c2.real-real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    return c;
}
void Complex::display()
{
    cout<<"("<<real<<","<<imag<<"i)"<<endl;
}
int main()
{
    Complex c1(3,4),c2(5,-10),c3;
    cout<<"c1=";
    c1.display();
    cout<<"c2=";
    c2.display();
    c3=c1+c2;
    cout<<"c1+c2=";
    c3.display();
    c3=c1-c2;
    cout<<"c1-c2=";
    c3.display();
   c3=c1*c2;
    cout<<"c1*c2=";
    c3.display();
    c3=c1/c2;
    cout<<"c1/c2=";
    c3.display();
    return 0;
}