定义一个复数类，重载运算符“+”，“-”，“++”，“>”，使之用于复数的加、减、自加并比较两个复数大小；

定义一个复数类，重载运算符“+”，“-”，“++”，“>”，使之用于复数的加、减、自加并比较两个复数大小；

代码如下：

#include <iostream>
using namespace std;
class Complex
{
public:
    double real;
    double image;
public:
    Complex(double r,double i)
    {
        real=r; image=i;
    }
    Complex(double r)
    {
        real=r; image=0;
    }
    Complex()
    {
        real=0; image=0;
    }

    Complex operator + (const Complex Right) 
    {
        Complex temp;
        temp.real = real + Right.real;
        temp.image = image + Right.image;
        return temp;
    }

    Complex operator - (const Complex Right) {
        Complex temp;
        temp.real = real - Right.real;
        temp.image = image - Right.image;
        return temp;
    }
    Complex operator ++(){
        this->real += 1;
        this->image += 1;
        return *this;
    }

    Complex operator --(){
        this->real -=1;
        this->image -=1;
        return *this;
    }


    Complex operator * (const Complex Right) {
        Complex temp;
        temp.real = real * Right.real - image * Right.image;
        temp.image = real * Right.image + image * Right.image;
        return temp;
    }

    Complex operator /(const Complex Right)
    {
        Complex temp;
        temp.real=real/Right.real;
        temp.image =image/Right.real;
        return temp;
    }

    int operator ==(const Complex Right)
    {
        if (this->real == Right.real && this->image < Right.image)
        {
            return 1;
        }else
            return 0;
    }

    int operator > (const Complex Right)
    {
        if(this->real > Right.real)
            return 1;
        else if (this->real == Right.real && this->image < Right.image)
        {
            return 1;
        }
        else if (this->real == Right.real && this->image == this->image)
        {
            return 0;
        }else
            return -1;
    }

    friend void print(Complex comp);

};


void print(Complex comp)
{
    cout<< comp.real << " + "<<comp.image << "i"<<endl;
}

int main()
{
    Complex c1(3.5,5.5);
    Complex c2(-3.5,1.0);

    Complex t1 = c1 + c2; 
    print(t1);
    Complex t2 = c1 - c2;
    print(t2);
    
    t2--;
    print(t2);

    t1++;
    print(t1);

    if(t1>t2)
        cout << "t1 > t2"<<endl;
    else if(t1==t2)
        cout <<"t1==t2"<<endl;
    else
        cout <<"t1<t2"<<endl;
    return 0;
}

#include <iostream>
using namespace std;
class Complex {
    public :
        Complex (double x=0,double y=0):real(x),imag(y) {}
        friend Complex operator * (Complex &c1,Complex &c2);
        friend Complex operator / (Complex &c1,Complex &c2);
        Complex operator + (Complex &c2 );
        Complex operator - (Complex &c2 );
        void display();
    private :
        double real;
        double imag;
};
Complex operator * (Complex &c1,Complex &c2) {
    return Complex (c1.real*c2.real-c1.imag*c2.imag,c1.real*c2.imag+c1.imag*c2.real);
}
Complex operator / (Complex &c1,Complex &c2) {
    Complex c;
    c.real=(c1.real*c2.real+c1.imag*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    c.imag=(c1.imag*c2.real-c1.real*c2.imag)/(c2.real*c2.real+c2.imag*c2.imag);
    return c;
}
Complex  Complex ::operator + (Complex &c2) {
    return Complex (real+c2.real,imag+c2.imag);
}
Complex  Complex ::operator - (Complex &c2) {
    return Complex (real-c2.real,imag-c2.imag);
}
void Complex ::display() {
    cout<<"<"<<real<<","<<imag<<"i>"<<endl;
}
int main() {
    Complex c1(3,4),c2(5,-10),c3;
    c1.display();
    c2.display();
    c3=c1+c2;
    c3.display();
    c3=c1-c2;
    c3.display();
    c3=c1*c2;
    c3.display();
    c3=c1/c2;
    c3.display();
    return 0;
}