/* (程序头部注释开始) 02.* 程序的版权和版本声明部分 03.* Copyright (c) 2011, 烟台大学计算机学院学生 04.* All rights reserved. 05.* 文件名称： 06. 07.* 作 者： 王明星 08.* 完成日期： 2012 年4 月 8 日 09.* 版 本 号： 10.* 对任务及求解方法的描述部分 11.* 输入描述： 12.* 问题描述： 13.* 程序输出： 14.* 程序头部的注释结束 15.*/ #include <iostream> using namespace std; class Complex { public: Complex(){real=0;imag=0;} Complex(double r,double i){real=r;imag=i;} Complex operator-(); //实现输入、输出的运算符重载 friend ostream& operator << (ostream& output,Complex& c); friend istream& operator >> (istream& input,Complex& c); //实现加减乘除的运算符重载 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); private: double real; double imag; }; //实现输出的运算符重载 ostream& operator << (ostream& output,Complex& c) { output<<"("<<c.real; if(c.imag>=0) output<<"+"; output<<c.imag<<"i)"; return output; } //实现输入的运算符重载 istream& operator >> (istream& input,Complex& c) { int a,b; char sign,i; do { cout<<"input a complex number(a+bi或a-bi):"; input>>a>>sign>>b>>i; } while(!((sign=='+'||sign=='-')&&i=='i')); c.real=a; c.imag=(sign=='+')?b:-b; return input; } 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; } int main() { Complex c1,c2,c3; double d=11; cout<<"c1: "<<endl;; cin>>c1; cout<<"c2: "<<endl; cin>>c2; cout<<"c1="<<c1<<endl; cout<<"c2="<<c2<<endl; cout<<"d="<<d<<endl; cout<<"-c1="<<(-c1); c3=c1+c2; cout<<"c1+c2="<<c3<<endl; cout<<"c1+d="<<(c1+d)<<endl; cout<<"d+c1="<<(d+c1)<<endl; c3=c1-c2; cout<<"c1-c2="<<c3<<endl; cout<<"c1-d="<<(c1-d)<<endl; cout<<"d-c1="<<(d-c1)<<endl; c3=c1*c2; cout<<"c1*c2="<<c3<<endl; cout<<"c1*d="<<(c1*d)<<endl; cout<<"d*c1="<<(d*c1)<<endl; c3=c1/c2; cout<<"c1/c2="<<c3<<endl; cout<<"c1/d="<<(c1/d)<<endl; cout<<"d/c1="<<(d/c1)<<endl; system("pause"); return 0; } 
上机感言：对“<<",">>"的重载使我们的是输入和输出更加直观了！！
