//friend.cpp -- by tsaiwn@csie.nctu.edu.tw
//friend id the only one who can touch your private
#include <iostream>
using namespace std;
//          ? FRIEND function
//          ? OVERLOADed function  (function name overloaded)
   class MySomething {
      int kk;
     public:
      float x,y;
      void talk(int);
     private:
      float z;
      friend void modifyme(int);
      friend void modifyme(float);
   };

   void modifyme(int m){
      MySomething you;
      you.kk = m*10;
      cout << "in First me\n";
      // ...
   }
   void modifyme(int m,int n){   // not my friend
      MySomething you;
      //you.kk = m+n;    // ERROR !
      cout << "in Second me\n";
      // ...
   }
   void modifyme(float m){
      MySomething you;
      you.z = m;
      you.x = m;
      cout << "in Third me\n";
      // ...
   }
int main()
{   MySomething him;
    modifyme(10);
    modifyme(1,2);
    modifyme((float)10.0);
    //him.kk := 123;
    return 0;
}