[-Prodigy-]

You want to give them armour only the first time they spawn after connect? Or every time they spawn?

pawn Код:

public OnPlayerSpawn(playerid)
{
    SetPlayerArmour(playerid, 100.0);
    return 1;
}

That will give them armour every time they spawn

pawn Код:

new bool: hadArmour[MAX_PLAYERS] = {false, ...};

public OnPlayerSpawn(playerid)
{
    if(hadArmour{playerid} == false)
    {
        SetPlayerArmour(playerid, 100.0);
        hadArmour{playerid} = true;
    }
    return 1;

That will only give them armour the first time they spawn.