项目二 实现复数类中的运算符重载(1)

/*copyright(c)2016.烟台大学计算机学院
 * All rights reserved,
 * 文件名称：text.Cpp
 * 作者：舒文超
 * 完成日期：2016年5月12日
 * 版本号：vc++6.0
 *
 * 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。
 */
#include<iostream>
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;
};
//下面定义成员函数
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 c3;
    c3.real=real+c2.real;
    c3.imag=imag+c2.imag;
    return c3;
}
Complex Complex::operator*(const Complex &c2)
{
    Complex c3;
    c3.real=real*c2.real;
    c3.imag=imag*c2.imag;
    return c3;
}
Complex Complex::operator/(const Complex &c2)
{
    Complex c3;
    c3.real=real/c2.real;
    c3.imag=imag/c2.imag;
    return c3;
}
void Complex::display()
{
    if(imag>0)
        cout<<real<<"+"<<imag<<"i"<<endl;
    else
        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;
}