[JaTochNietDan]

There's no need for enum there, just an array with values inserted

pawn Код:

new Skins[4] = {
    skin1,
    skin2,
    skin3
};

Then you would select a random cell in the Skins array and use the integer stored there for the skin ID.

pawn Код:

SetPlayerSkin(playerid, Skins[random(sizeof(Skins)]);