ATL / WTL / STL

class CBase {
    string id;
public:
    void show() {
        cout <<  id << endl;
    }
};

class CDerive1 : public CBase { };
class CDerive2 : public CBase { };
class CSon : public CDerive2, public CDerive1 { };

int main ( )
{
    CSon s;
    cout <<  &s << endl;
    cout <<  "---------" << endl;

    CDerive1 *pd1 = &s;
    cout <<  pd1 << " &S: " << &s <<  endl;
    CDerive2 *pd2 = &s;
    cout <<  pd2 << " &S: " << &s <<  endl;
    cout <<  "---------" << endl;

Write a C
 Program to find the survivor in a "7 up" game.
   In the game, a group of people stand in a circle,and start counting from 1 in a clockwise direction.
   The person who has to say "7" goes out, and the person next to him starts counting from 1 again.
   This goes on until only one person remains, and he is survivor. Your goal is,
   given the size of the group find out the place(Index) in which a person has to stand for him to become the survivor