第12周项目实现复数类中的运算符重载3

最新推荐文章于 2020-05-11 17:07:51 发布

原创最新推荐文章于 2020-05-11 17:07:51 发布 · 244 阅读

CC 4.0 BY-SA版权

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运算，包括加法、减法、乘法和除法，并通过友元函数的方式实现了运算符重载。此外，还提供了与实数混合运算的功能。

#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,const Complex &c2);
friend  Complex operator*(const Complex &c1,const Complex &c2);
friend  Complex operator/(const Complex &c1,const Complex &c2);


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

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.imag*c2.real+c1.real*c2.imag);
}

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


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




void Complex::display()
{
    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;
    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=c1-2;
    cout<<"c1-2=";
    c3.display();
    c3=c1*2;
    cout<<"c1*2=";
    c3.display();
    return 0;
}

运行结果：