實現複數類中的運算符重載

#include
using namespace std;
class Complex
{
public:
    Complex(){real=0;imag=0;}
    Complex(double r,double i){real=r;imag=i;}
    Complex operator+(const Complex &c2);
    Complex operator-(const Complex &c2);
    Complex operator*(const Complex &c2);
    Complex operator/(const Complex &c2);
    void display();
private:
    double real;
    double imag;
};
Complex Complex::operator+(const Complex &c2)
{
    return Complex(real+c2.real,imag+c2.imag);
}
Complex Complex::operator-(const Complex &c2)
{
    return Complex(real-c2.real,imag-c2.imag);
}
Complex Complex::operator*(const Complex &c2)
{
    return Complex(real*c2.real,imag*c2.imag);
}
Complex Complex::operator/(const Complex &c2)
{
    return Complex(real/c2.real,imag/c2.imag);
}
void Complex::display()
{
    cout<<"("<<real<<","<<imag<<")"<<endl;
}
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();
    return 0;
}