[RyDeR`]

That' not a function, but it can aswell be shortened:

pawn Code:

stock damagePlayer(playerid, Float: fDamage) {
    new
        Float: fHealth,
        Float: fArmour
    ;
    GetPlayerHealth(playerid, fHealth);
    GetPlayerArmour(playerid, fArmour);
    
    fHealth += fArmour - fDamage;
    
    SetPlayerArmour(playerid, (fHealth > 100.0) ? (fHealth - 100.0) : (0.0));
    SetPlayerHealth(playerid, (fHealth > 100.0) ? (100.0) : (fHealth));
}

I think this should do pretty much the same.