#include <iostream>
using namespace std;

class Complex{
private:
    float r,i;
public:
    Complex operator +(Complex &b);
    Complex();
    Complex(float,float);
    void show();
};

Complex Complex::operator +(Complex &b){
    Complex temp;
    temp.r=r+b.r;
    temp.i=i+b.i;
    return temp;
}

Complex::Complex(){r=0;i=0;}
Complex::Complex(float a, float b){
    r=a;i=b;
}
void Complex::show(){
    if(i<0)
        cout<<r<<"-"<<-i<<endl;
    else
        cout<<r<<"+"<<i<<endl;
}

int main(){
    Complex c1(10,11),c2(12,-13),c3;//编译时这里出错了
    c3=c1+c2;
    c3.show();  
    return 0;
}