4/18打卡 复数的输入输出和加减乘除重载

class Complex {
    double real;
    double imag;
public:
    friend istream& operator>>(istream& is, Complex& c);
    friend ostream& operator <<(ostream& os, const Complex& a);
    Complex() {
        real = 0;
        imag = 0;
    }
    Complex(double a, double b) :real(a), imag(b) {}
    //+
    Complex operator +(const Complex& a)
    {
        Complex b;
        b.imag = imag + a.imag;
        b.real = real + a.real;
        return b;
    }
    //-
    Complex operator -(const Complex& a)
    {
        Complex b;
        b.imag = imag - a.imag;
        b.real = real - a.real;
        return b;
    }
    //*
    Complex operator*(const Complex& other) const {
        return Complex(real * other.real - imag * other.imag,
            real * other.imag + imag * other.real);
    }
    // /
    Complex operator/(const Complex& other) const {
        double denominator = other.real * other.real + other.imag * other.imag;
        return Complex((real * other.real + imag * other.imag) / denominator,
            (imag * other.real - real * other.imag) / denominator);
    }
};

ostream& operator <<(ostream& os, const Complex& a)
{
    cout << a.real << "+" << a.imag << "i" << endl;
    return os;
}

istream& operator>>(istream& is, Complex& c)
{
    cout << "请输入实部和虚部：" << endl;
    is >> c.real >> c.imag;
    return is;
}
int main()
{
    Complex a = { 4,5 };
    Complex b = { 2,3 };
    Complex c = a + b;
    Complex d;
    cin >> d;
    Complex e = c / d;
    cout << "c\t" << c << endl;
    cout << "d\t" << d << endl;
    cout << "e\t" << e << endl;
    return 0;
}