第九周实验一

/* (程序头部注释开始)* 程序的版权和版本声明部分* Copyright (c) 2011, 烟台大学计算机学院学生 * All rights reserved.* 文件名称：定义一个复数类重载运算符+、-、*、/，使之能用于复数的加减乘除。
* 作    者：彭志康                         * 完成日期：     * 版 本 号：        * 对任务及求解方法的描述部分* 输入描述： * 问题描述： * 程序输出： * 程序头部的注释结束
*/
 
#include <iostream>  using namespace std;  class Complex  {  public:      Complex(){real=0;imag=0;}      Complex(double r,double i){real=r;imag=i;}      Complex operator-();      friend Complex operator+(Complex &c1, Complex &c2);      friend Complex operator+(double d1, Complex &c2);      friend Complex operator+(Complex &c1, double d2);      friend Complex operator-(Complex &c1, Complex &c2);      friend Complex operator-(double d1, Complex &c2);      friend Complex operator-(Complex &c1, double d2);      friend Complex operator*(Complex &c1, Complex &c2);      friend Complex operator*(double d1, Complex &c2);      friend Complex operator*(Complex &c1, double d2);      friend Complex operator/(Complex &c1, Complex &c2);      friend Complex operator/(double d1, Complex &c2);      friend Complex operator/(Complex &c1, double d2);      void display();friend ostream& operator << (ostream&,Complex&);private:      double real;      double imag;  };    Complex Complex::operator-()  {      return(0-*this);  }    //复数相加：(a+bi)+(c+di)=(a+c)+(b+d)i.   Complex operator+(Complex &c1, Complex &c2)  {      Complex c;      c.real=c1.real+c2.real;      c.imag=c1.imag+c2.imag;      return c;  }  Complex operator+(double d1, Complex &c2)  {      Complex c(d1,0);      return c+c2; //按运算法则计算的确可以，但充分利用已经定义好的代码，既省人力，也避免引入新的错误，但可能机器的效率会不佳  }  Complex operator+(Complex &c1, double d2)  {      Complex c(d2,0);      return c1+c;  }  //复数相减：(a+bi)-(c+di)=(a-c)+(b-d)i.  Complex operator-(Complex &c1, Complex &c2)  {      Complex c;      c.real=c1.real-c2.real;      c.imag=c1.imag-c2.imag;      return c;  }  Complex operator-(double d1, Complex &c2)  {      Complex c(d1,0);      return c-c2;    }  Complex operator-(Complex &c1, double d2)  {      Complex c(d2,0);      return c1-c;  }    //复数相乘：(a+bi)(c+di)=(ac－bd)+(bc+ad)i.  Complex operator*(Complex &c1, Complex &c2)  {      Complex c;      c.real=c1.real*c2.real-c1.imag*c2.imag;      c.imag=c1.imag*c2.real+c1.real*c2.imag;      return c;  }  Complex operator*(double d1, Complex &c2)  {      Complex c(d1,0);      return c*c2;  }  Complex operator*(Complex &c1, double d2)  {      Complex c(d2,0);      return c1*c;  }    //复数相除：(a+bi)/(c+di)=(ac+bd)/(c^2+d^2) +(bc-ad)/(c^2+d^2)i   Complex operator/(Complex &c1, Complex &c2)  {      Complex c;      c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);      c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);      return c;  }  Complex operator/(double d1, Complex &c2)  {      Complex c(d1,0);      return c/c2;  }  Complex operator/(Complex &c1, double d2)  {      Complex c(d2,0);      return c1/c;  }    void Complex::display()  {      cout<<"("<<real<<","<<imag<<"i)"<<endl;  }ostream& operator << (ostream& output,Complex&c){output << "(" << c.real << "," << c.imag << "i)" << endl;return output;}  int main()  {      Complex c1(3,4),c2(5,-10),c3;      double d=11;      cout<<"c1="<<c1;     cout<<"c2="<<c2;      cout<<"d="<<d<<endl;      cout<<"-c1="<<-c1;    c3=c1+c2;      cout<<"c1+c2="<<c3;c3=c1+d;    cout<<"c1+d="<<c3;c3=d+c1;    cout<<"d+c1="<<c3;       c3=c1-c2;      cout<<"c1-c2="<<c3; c3=c1-d;    cout<<"c1-d="<<c3; c3=d-c1;    cout<<"d-c1="<<c3;        c3=c1*c2;      cout<<"c1*c2="<<c3; c3=c1*d;    cout<<"c1*d="<<c3;c3=d*c1;    cout<<"d*c1="<<c3;       c3=c1/c2;      cout<<"c1/c2="<<c3; c3=c1/d;    cout<<"c1/d="<<c3;c3=d/c1;    cout<<"d/c1="<<c3;           system("pause");      return 0;  }