class - C++ list looping -

im quite stuck here. have been trying , googling past 2 days cant figure out. have class called player , called enemy inherits player. have list stores coordinates bullets , loop trough them in player. im trying access , loop trough same list check collision in enemy builds on player, not enter loop. guess somehow empty why?

struct structshoot {     float x;     float y; };  class player { private:       blablabla protected:     list<structshoot>::iterator it;     list<structshoot> shoot_list;     structshoot test; public:      void render(sdl_surface* dest); };  void player::render(sdl_surface* dest) {     //works fine, see other loop down below for(it = shoot_list.begin(); != shoot_list.end();) {     shoot.moveset(it->x, it->y);     shoot.draw(dest);     it->y--;      if((it->y) < -25)     {            = shoot_list.erase(it);     }      else     {         it++;     }     } }  class enemy : protected player {  public:  void render(sdl_surface* dest); };  void enemy::render(sdl_surface* dest) {     sdl_rect a, b;       //does not enter loop!? ever. why?     for(it = shoot_list.begin(); != shoot_list.end();)     {         sdl_quit();         a.x = enemy.getx();         a.y = enemy.gety();         a.w = enemy.getwidth();         a.h = enemy.getheight();          b.x = it->x;         b.y = it->y;         b.w = 10;         b.h = 19;         it->y--;           if (collision(a, b) == true)         {             sdl_quit();         }          if(it->y < -25)         {                = shoot_list.erase(it);         }          else         {             it++;         }          } } 

you should make render virtual use polymorphism.

virtual void render(sdl_surface* dest);

i suppose every time call player::render, because of such code:

player* enemy = new enemy(); enemy->render(); // there player::render calling 

if make render virtual use virtual table detect correct function should called in place. have make render virtual.