How to modify a value in a class? (C++) -

i'm trying add or subtract value in class, main file, seems reset value zero. being beginner don't understand why?! everytime print player.worldpositiony says either -1, 1, or 0 (if neither 1 or 2 selected - moveforward or moveback)

i have 2 simple files, main.cpp:

#include <iostream> #include "player.h"  using namespace std;  int keyboardinput;  int main() {     player player;      cin.get();     cin >> keyboardinput;      if (keyboardinput == 1){         player.moveforward();     } else if (keyboardinput == 2){         player.moveback();     }      cout << "y: " << player.worldpositiony << endl;     main(); } 

and player.h:

class player { public:     int worldpositiony = 0;      void moveforward();     void moveback(); };  void player::moveforward(){worldpositiony += 1;}  void player::moveback(){worldpositiony -= 1;} 

i'm missing something. please help!

you're calling main recursively. don't want this, instead:

int main() {     player player;      while (true)     {         cin.get();         cin >> keyboardinput;          if (keyboardinput == 1){             player.moveforward();         } else if (keyboardinput == 2){             player.moveback();         }          cout << "y: " << player.worldpositiony << endl;     } } 

calling main recursively means player object recreated every time input value, why values either -1 or 1.