第九周项目1-复数类中的运算符重载

最新推荐文章于 2020-09-26 17:36:07 发布

原创最新推荐文章于 2020-09-26 17:36:07 发布 · 937 阅读

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#运算符重载 #输入输出流重载 #复数类 #友元函数

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本文介绍了一个使用C++实现的复数类模板，通过重载运算符+、-、*、/来支持复数的加减乘除操作。文章提供了完整的源代码，并演示了如何输入复数以及进行基本的算术运算。

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/*
*程序的版权和版本声明部分：
*Copyright(c)2014，烟台大学计算机学院学生
*All rights reserved.
*文件名称:
*作者：田成琳
*完成日期：2014  年 4 月 22 日
*版本号：v1.0
*对任务及求解方法的描述部分：
*输入描述：无
*问题描述：复数类模板
          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
*程序输出：- -
*问题分析：
*算法设计：
*/
#include<iostream.h>
//using namespace std;
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r; imag=i;}
	friend istream & operator >>(istream &input,Complex &c);
	friend ostream & operator <<(ostream &output,Complex &c);
	friend Complex operator-(Complex &c);
    friend Complex operator+(Complex c1,Complex &c2);
    friend Complex operator+(double &b,Complex &c2);
    friend Complex operator+(Complex &c2,double &b);
    friend Complex operator-(Complex c1,Complex &c2);
    friend Complex operator-(double &b,Complex &c2);
    friend Complex operator-(Complex &c2,double &b);
    friend Complex operator*(Complex c1,Complex &c2);
    friend Complex operator*(double &b,Complex &c2);
    friend Complex operator*(Complex &c2,double &b);
    friend Complex operator/(Complex c1,Complex &c2);
    friend Complex operator/(double &b,Complex &c2);
    friend Complex operator/(Complex &c2,double &b);
private:
    double real;
    double imag;
};
istream & operator >>(istream &input,Complex &c)
{
	int a,b;
	char i,sign;
	cout<<"请输入复数(a+bi形式)："<<endl;
	input>>a>>sign>>b>>i;
	while(!(sign=='+'||sign=='-'||i=='i'))
	{
		cout<<"格式不正确，请重新输入："<<endl;
		input>>a>>sign>>b>>i;
	}
	c.real=a;
	c.imag=(sign=='+')?b:-b;
	return input;
}
ostream & operator <<(ostream &output,Complex &c)
{
	output<<"("<<c.real;
	if(c.imag>=0)
		output<<"+"<<c.imag<<"i)"<<endl;
	else
		output<<"-"<<-c.imag<<"i)"<<endl;
	return output;
}
Complex operator-(Complex &c)
{
	return Complex(-c.real,-c.imag);
}
Complex operator+(Complex c1,Complex &c2)
{
	return Complex(c1.real+c2.real,c1.imag+c2.imag);
}

Complex operator+(double &b,Complex &c2)
{
	return Complex(b+c2.real,c2.imag);
}

Complex operator+(Complex &c2,double &b)
{
	return Complex(b+c2.real,c2.imag);
}

Complex operator-(Complex c1,Complex &c2)
{
	return Complex(c1.real-c2.real,c1.imag-c2.imag);
}

Complex operator-(double &b,Complex &c2)
{
	return Complex(c2.real-b,c2.imag);
}

Complex operator-(Complex &c2,double &b)
{
	return Complex(c2.real,c2.imag-b);
}

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 &b,Complex &c2)
{
    return Complex(b*c2.real,b*c2.imag);
}

Complex operator*(Complex &c2,double &b)
{
	return Complex(b*c2.real,b*c2.imag);
}

Complex operator/(Complex c1,Complex &c2)
{
	Complex c;
	double d=c2.real*c2.real+c2.imag*c2.imag;
	c.real=(c1.real*c2.real+c1.imag*c2.imag)/d;
	c.imag=(c1.imag*c2.real-c1.real*c2.imag)/d;
	return c;
}

Complex operator/(double &b,Complex &c2)
{
	double d=c2.real*c2.real+c2.imag*c2.imag;
	return Complex((b*c2.real)/d,(b*c2.imag)/d);
}

Complex operator/(Complex &c2,double &b)
{
	return Complex(c2.real/b,c2.imag/b);
}
int main()
{
    Complex c1,c2,c3;
	cin>>c1>>c2;
	cout<<"c1="<<c1<<"c2="<<c2<<"c1+c2="<<c1+c2;
	cout<<"-(c1+c2)="<<-(c1+c2);
	return 0;
}

运行结果：

心得体会：。