第8周项目1（3）—扩充运算符功能

最新推荐文章于 2025-10-29 10:13:47 发布

原创最新推荐文章于 2025-10-29 10:13:47 发布 · 485 阅读

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本文介绍了一个使用C++实现的复数类，该类支持基本的复数加减乘除运算，并提供了友元函数来重载这些运算符。通过这个类可以方便地进行复数之间的数学运算。

#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+(const Complex &c1,const Complex &c2);
    friend Complex operator+(const Complex &c1,double a);
    friend Complex operator-(const Complex &c1,const Complex &c2);
    friend Complex operator-(const Complex &c1,double a);
    friend Complex operator*(const Complex &c1,const Complex &c2);
    friend Complex operator*(const Complex &c1,double a);
    friend Complex operator/(const Complex &c1,const Complex &c2);
    friend Complex operator/(const Complex &c1,double a);
    void display();
private:
    double real;
    double imag;
};
//下面定义成员函数
Complex operator+(const Complex &c1,double a)
{
    return Complex(c1.real+a,c1.imag);
}
Complex operator-(const Complex &c1,double a)
{
    return Complex(c1.real-a,c1.imag);
}
Complex operator*(const Complex &c1,double a)
{
    return Complex(c1.real*a,c1.imag*a);
}
Complex operator/(const Complex &c1,double a)
{
    return Complex(c1.real/a,c1.imag/a);
}
Complex operator+(const Complex &c1,const Complex &c2)
{
    return Complex(c1.real+c2.real,c1.imag+c2.imag);
}
Complex operator-(const Complex &c1,const Complex &c2)
{
    return Complex(c1.real-c2.real,c1.imag-c2.imag);
}
Complex operator*(const Complex &c1,const Complex &c2)
{
    return Complex(c1.real*c2.real-c1.imag*c2.imag,c1.real*c2.imag+c2.real*c1.imag);
}
Complex operator/(const Complex &c1,const Complex &c2)
{
    return Complex((c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag),(-c1.real*c2.imag+c2.real*c1.imag)/(c2.real*c2.real+c2.imag*c2.imag));
}
void Complex::display()
{
    if(imag>0)
    cout<<real<<"+"<<imag<<"i"<<endl;
    else
        cout<<real<<imag<<"i"<<endl;
}
//下面定义用于测试的main()函数
int main()
{
    Complex c1(3,4),c2(5,-10),c3;
    double a=3;
    cout<<"c1=";
    c1.display();
    cout<<"c2=";
    c2.display();
    c3=c1+a;
    cout<<"c1+a=";
    c3.display();
    c3=c1-a;
    cout<<"c1-a=";
    c3.display();
    c3=c1*a;
    cout<<"c1*a=";
    c3.display();
    c3=c1/a;
    cout<<"c1/a=";
    c3.display();
    return 0;
}