[c++]複數的運算子多載

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類的定義和聲明

<span style="font-size:32px;">#include<iostream>#include<string>using namespace std;class Complex{    friend istream& operator>>(istream &in, Complex &c);    friend ostream& operator<<(ostream &out, const Complex &c);    friend Complex operator+(int x, Complex &c);public:    Complex(const int real=0,const int imag=0):m_real(real),m_imag(imag)    {}    ~Complex()    {}    void Show()const    {        cout<<"("<<m_real<<","<<m_imag<<")"<<endl;    }public:    Complex operator+(Complex &c)    {        return Complex(m_real+c.m_real,m_imag+c.m_imag);    }    Complex operator-(Complex &c)    {        return Complex(m_real-c.m_real,m_imag-c.m_imag);    }    Complex operator*(Complex &c);    Complex operator/(Complex &c);    Complex operator+=(Complex &c);    Complex operator-=(Complex &c);    Complex operator*=(Complex &c);    Complex operator/=(Complex &c);    Complex operator+(int x);    //friend Complex operator+(int x, Complex &c);private:    int m_real;    int m_imag;};Complex Complex::operator+(int x){    return Complex(m_real+x,m_imag);}Complex Complex:: operator+=(Complex &c){    m_real = m_real+c.m_real;    m_imag = m_imag+c.m_imag;    return *this;}Complex Complex::operator-=(Complex &c){    m_real = m_real - c.m_real;    m_imag = m_imag - c.m_imag;    return *this;}Complex Complex:: operator*(Complex &c){    return Complex(m_real*c.m_real-m_imag*c.m_imag,m_imag*c.m_real+m_real*c.m_imag);}Complex Complex::operator*=(Complex &c){    int i = m_real;    m_real = m_real*c.m_real-m_imag*c.m_imag;    m_imag = m_imag*c.m_real+i*c.m_imag;    return *this;}Complex Complex::operator/(Complex &c){    Complex temp;    temp.m_real = (m_real*c.m_real+m_imag*c.m_imag)/(c.m_real*c.m_real+c.m_imag*c.m_imag);    temp.m_imag = (m_imag*c.m_real-m_real*c.m_imag)/(c.m_real*c.m_real+c.m_imag*c.m_imag);    return temp;}Complex Complex:: operator/=(Complex &c){    int i = m_real;    m_real = (m_real*c.m_real+m_imag*c.m_imag)/(c.m_real*c.m_real+c.m_imag*c.m_imag);    m_imag = (m_imag*c.m_real-i*c.m_imag)/(c.m_real*c.m_real+c.m_imag*c.m_imag);    return *this;}ostream& operator<<(ostream &out, const Complex &c){    out<<"("<<c.m_real<<","<<c.m_imag<<")";    return out;}istream& operator>>(istream &in, Complex &c){    in>>c.m_real>>c.m_imag;    return in;}</span>

測試程式：

int main(){    Complex c1(1,1);    Complex c2(1,-1);        Complex c;    //c1.operator+(c2)    c = c1 + c2;    cout<<c<<endl;//    c = c1 * c2;//    cout<<c<<endl;//    c = c1 / c2;//    cout<<c<<endl;//    c = 2 + c1;//    cout<<c<<endl;//    c1+=c2;//    cout<<c1<<endl;//    c1-=c2;//    cout<<c1<<endl;//    c1*=c2;//    cout<<c1<<endl;//    c1/=c2;//    cout<<c1<<endl;//請不要把它們一起測試，分開    Complex c3;    cin>>c3;    cout<<c3;    return 0;}

[c++]複數的運算子多載