一个简单的问题，运算符重载

#include <iostream>

using namespace std;



class point

{

      private:

              int  val;

              bool hb;

              bool buf;

      public:

              

              point ():hb(0),buf(0),val(1){}

              point (const point &temp){val=temp.val;hb=temp.hb;buf=temp.buf;}

              point operator +(const point& temp)

              {

                    point reval;

                    if (hb == temp.hb&& buf==temp.buf )

                    reval.val=val+temp.val;

                   

                    return reval;

              }

              

              friend int &operator =(int &tmp1, point &tmp2 )

              {

                     tmp1=tmp2.val;

                     

                     return tmp1;

                     

              }

                     

}; 



int main()



{

    

    point table;

    int sanheng ;

    sanheng=table;

    

    cout <<sanheng<<endl;

    system("pause");

}