NPC 问题: NPC攻击NPC侦测FUNCTION的问题

public FindClosesEnemy(entid)
{
    new Float:Dist
    new Float:maxdistance=5000.0
    new indexid=0
    new i;
    while ((is_valid_ent(i = find_ent_by_class (i, CLASSNAME))) || (is_valid_ent(i = find_ent_by_class (i, "player"))))
    //for(new i=1;i <= get_maxplayers();i++)
    {
     new Ptdclassname[32]
  pev(i, pev_classname, Ptdclassname, charsmax(Ptdclassname))
  if (equal(Ptdclassname, CLASSNAME) && i != entid)
  {
   if (is_valid_ent(i) && pev(i,pev_health) > 0.0)
   {
    Dist = entity_range(entid, i)
             if(Dist <= maxdistance)
             {
                 maxdistance=Dist
                 indexid=i
                }
            }
        }
        else if (equal(Ptdclassname, "player"))
        {
         if(is_user_alive(i) && is_valid_ent(i) && cs_get_user_team(i) == CS_TEAM_CT && is_user_connected(i))
         {
             Dist = entity_range(entid, i)
             if(Dist <= maxdistance)
             {
                 maxdistance=Dist
                 indexid=i
             }
         }
           
     }
    }
    return indexid
}