C++程序设计实验报告（五十三）---第八周任务1-3

/* (程序头部注释开始)

* 程序的版权和版本声明部分

* Copyright (c) 2012, 烟台大学计算机学院学生

* All rights reserved.

* 文件名称：重载运算符（复数）

* 作 者： 刘镇

* 完成日期： 2012 年 4 月 7 日

* 版 本 号： 1.049

* 对任务及求解方法的描述部分

* 输入描述： ......

* 问题描述： 友元函数实现运算符重载，复数运算

* 程序输出： 复数

* 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;}
friend Complex operator +(Complex &c1, Complex &c2);
friend Complex operator -(Complex &c1, Complex &c2);
friend Complex operator *(Complex &c1, Complex &c2);
friend Complex operator /(Complex &c1, Complex &c2);
friend Complex operator + (Complex &c1, Complex &c2);
friend Complex operator + (Complex &c, const double &d);
friend Complex operator + (const double &d, Complex &c);
friend Complex operator - (Complex &c, const double &d);
friend Complex operator - (const double &d, Complex &c);
friend Complex operator * (Complex &c, const double &d);
friend Complex operator * (const double &d, Complex &c);
friend Complex operator / (Complex &c, const double &d);
friend Complex operator / (const double &d, Complex &c);
friend Complex operator - (Complex &c);
void display();
private:
double real;
double imag;
};
//下面定义成员函数

Complex operator - (Complex &c)
{
return Complex(0 - c.real, c.imag);
}

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

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

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

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

void Complex::display()
{
cout << "(" << real << "," << imag << "i )" << endl;
}

Complex operator + (const double &d,Complex &c)
{
return Complex(d + c.real, c.imag);
}

Complex operator+ (Complex &c, const double &d)
{
return Complex(d + c.real, c.imag);
}

Complex operator- (Complex &c, const double &d)
{
return Complex(d - c.real, c.imag);
}

Complex operator- (const double &d, Complex &c)
{
return Complex(d - c.real, c.imag);
}

Complex operator* (Complex &c, const double &d)
{
return Complex(d * c.real, c.imag);
}

Complex operator* (const double &d, Complex &c)
{
return Complex(d * c.real, c.imag);
}

Complex operator/ (Complex &c, const double &d)
{
return Complex(d / c.real, c.imag);
}

Complex operator/ (const double &d, Complex &c)
{
return Complex(d / c.real, c.imag);
}

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();

c3 = c1 * 4;

cout << "c1 * 4 =";

c3.display();

c3 = c1 / 3;

cout << "c1 / 3 =";

c3.display();

c3 = 4 + c2;

cout << "4 + c2 =";

c3.display();

c3 = 4 - c2;

cout << "4 - c2 =";

c3.display();

c3 = - c1;

cout << "- c1 =" ;

c3.display();

system("pause");

return 0;
}

运行结果：