运算符重载 负数类 ＋

#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);
    void display();
private:
    double real,imag;
};
Complex Complex::operator+(const Complex &c2)
{
    return Complex(real+c2.real,imag+c2.imag);
}
void Complex::display()
{
    if(imag<0){
    cout<     }
    else
    {
        cout<     }
}
int main()
{
    Complex c1(1,2),c2(1,1),c3;
    c3=c1+c2;
    c3.display();
    return 0;
}