[FireCat]

https://sampwiki.blast.hk/wiki/GetPlayerHealth

Quote:

Returns The function itself doesn't return a specific value. The player's health is stored in the specified variable.

If you do

pawn Код:

if(GetPlayerHealth(playerid,health) == 100) return SendClientMessage(playerid,lightyellow,"I think you are bit too full for eating");

You're trying to retrieve the players health, directly.
That wouldn't work.