[BMUK]

And... you can check that it's numeric in the response call back to save any problems

pawn Код:

if(!IsNumeric(inputtext)) return SendClientMessage(playerid,COLOR_RED,"You must write numbers. Not letters");

pawn Код:

stock IsNumeric(const string[])
{
  for (new i = 0, j = strlen(string); i < j; i++)
  {
    if (string[i] > '9' || string[i] < '0')
    {
      return 0;
    }
  }
  return 1;
}