第九周项目一 复数类中的运算符重载（续）

/*
*Copyright (c)2014,烟台大学计算机与控制工程学院
*All rights reserved.
*文件名称：test.cpp
*作    者：徐洪祥
*完成日期：2015年5月16日
*版 本 号：v1.0
*
* 问题描述：在第八周项目一基础上，再定义一目运算符-，-c相当于0-c；定义Complex类中的<<和>>运算符的重载，
实现输入和输出，改造原程序中对运算结果显示方式，使程序读起来更自然。
* 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;
}
Complex operator-();
//实现输入、输出的运算符重载
friend ostream& operator << (ostream& output, const 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;
};
ostream& operator << (ostream& output,const Complex& c)
{
output<<"("<<c.real;
if(c.imag>=0)
output<<"+"<<c.imag<<"i)"<<endl;
else
output<<c.imag<<"i)"<<endl;
return output;
}
istream& operator >> (istream& input,Complex& c)
{
int a,b;
char s,i;
do
{
cout<<"input a Complex number(a+bi)或(a-bi)"<<endl;
input>>a>>s>>b>>i;
}
while(!((s=='+'||s=='-')&&i=='i'));
c.real=a;
c.imag=(s=='+')?b:-b;
return input;
}
Complex Complex::operator-()
{
return 0-*this;
}
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;
}
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;
}
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;
}
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;
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;
return 0;
}