这个程序编译不过去，大家伙帮我看看！

#include <iostream>
using namespace std;
class Complex
{
  public:
  Complex(){real = 0;imag = 0;}
  Complex(int r,int i):real(r),imag(i){}
  Complex(int r){real = r;imag = 0;}
  ~Complex(){cout << "the object is over" << endl;}
  void display(void){cout << real << " + " << imag << "i" << endl;}
  Complex operator+(Complex &);
  private:
  int real;
  int imag;
};

Complex Complex :: operator+(Complex & x)
{
  return Complex(x.real +real,x.imag + imag);
}
int main(void)
{
  Complex c1(1,1),c2(2,2),c3;
  c3 = c1 + Complex(1,0);//这里好像有问题
}[/size]

Complex Complex :: operator+(Complex & x)
{
  return Complex(x.real +real,x.imag + imag);
}
 


这个有问题吧， 私有变量可以这样访问？

可以呀，类的的成员函数可以默认访问类的数据成员

1. 
c3 = c1 +　c2 
OK

2. 
 Complex operator+(Complex);
Complex Complex :: operator+(Complex x)
{
  return Complex(x.real +real,x.imag + imag);
}

ok

vs2008能编译，能运行

补充说明：
C++语言禁止为非常量引用产生临时对象

gcc下修改下：
Complex operator+(Complex &);改成如下
Complex operator+(const Complex &);