第八周（运算符重载）一般函数

/*

*copyright(c) 2015,烟台大学计算机学院

*All rights reserved。

*文件名称：第八周（运算符重载）

*作者：王忠

*完成日期：2015.4.28

*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：

*程序输出：

#include <iostream>
using namespace std;

class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r; imag=i;}
    double  getreal()
    {
        return real;
    }
    double  getimag()
    {
        return imag;
    }
    double setreal(double r)
    {
        real=r;
    }
    double setimag(double i)
    {
        imag=i;
    }
    void display();
private:
    double real;
    double imag;
};
//下面定义成员函数
 Complex operator+(Complex &c1,Complex &c2)
    {
        Complex c;
        c.setreal(c1.getreal()+c2.getreal());
        c.setimag(c1.getimag()+c2.getimag());
        return c;
    }
 Complex operator-(Complex &c1,Complex &c2)
    {
        Complex c;
        c.setreal(c1.getreal()-c2.getreal());
        c.setimag(c1.getimag()-c2.getimag());
        return c;
    }
 Complex operator*(Complex &c1,Complex &c2)
    {
        Complex c;
        c.setreal(c1.getreal()*c2.getreal()-c1.getimag()*c2.getimag());
        c.setimag(c1.getimag()*c2.getreal()+c1.getreal()*c2.getimag());
        return c;
    }
 Complex operator/(Complex &c1,Complex &c2)
    {
        Complex c;
        c.setreal((c1.getreal()*c2.getreal()+c1.getimag()*c2.getimag())/(c2.getreal()*c2.getreal()+c2.getimag()*c2.getimag()));
        c.setimag((c1.getimag()*c2.getreal()-c1.getreal()*c2.getimag())/(c2.getreal()*c2.getreal()+c2.getimag()*c2.getimag()));
        return c;
    }
void Complex::display()
{
    cout<<real<<'+'<<imag<<'i'<<endl;
}

//下面定义用于测试的main()函数
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;
}

数不清的括号 看着眼花缭乱的~~~~~~