#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(r<0)cout<<r<<"-"<<i<<"i"<<endl;
 else if(r=0)cout<<r<<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;
}

no matching function for call to `Complex::Complex(int, int)'
Complex::Complex(float&, float&)
Complex::Complex()