c++第八章复数运算

创建复数类实现复数运算

#include<iostream>
using namespace std;
class Complex
{
    double real;
    double image;
public:
    Complex()
    {
        real = 0;
        image = 0;
    }
    Complex(int r, int i)
    {
        real = r;
        image = i;
    }
    Complex Add(Complex&);
    Complex Sub(Complex&);
    Complex Multi(Complex&);
    void dispay()
    {
        if (real == 0)
            cout << image << "i" << endl;
        else if (real != 0 && image == 0)
            cout << real << endl;
        else if (real != 0 && image < 0)
            cout << real << image << "i" << endl;
        else
            cout << real << "+" << image << "i" << endl;
    }
};
Complex Complex::Add(Complex& c2)
{
    Complex c;
    c.real = this->real + c2.real;
    c.image = this->image + c2.image;
    return c;
}
Complex Complex::Sub(Complex& c2)
{
    Complex c;
    c.real = this->real - c2.real;
    c.image = this->image - c2.image;
    return c;
}
Complex Complex::Multi(Complex& c2)
{
    Complex c;
    c.real = this->real * c2.real - this->image * c2.image;
    c.image = this->real * c2.image + this->image * c2.real;
    return c;
}
int main()
{
    Complex c1(1, 2);
    Complex c2(2, 3);
    Complex temp;
    temp=c1.Add(c2);
    temp.dispay();
    temp = c1.Multi(c2);
    temp.dispay();
    temp = c1.Sub(c2);
    temp.dispay();
    return 0;
}

遇到问题：

要考虑实部为零，虚部为零，虚部为负这几个情况