[d3Pedro]

This will also work

pawn Код:

GetAdminRankName(playerid)
{
    new string[24];
    switch(PlayerInfo[playerid][pAdmin])
    {
        case 0:
        {
            string = "Moderator"
        }
        case 1:
        {
            string = "Game Administrator"
        }
        case 2:
        {
            string = "Lead Administrator"
        }
        case 3:
        {
            string = "Server Manager"
        }
    }
    return string;
}
CMD:makeadmin(playerid, params[])
{
    new id, AdminLevel;

    if(PlayerInfo[targetid][pAdmin] >= 3 || IsPlayerAdmin(playerid))
    {
        if(sscanf(params, "ui", id, AdminLevel))
            return SendClientMessage(playerid, -1, "USAGE: /makeadmin [ID] [LEVEL 1-4]");

        if(AdminLevel < 1 || AdminLevel > 4)
            return SendClientMessage(playerid, COLOR_RED, "ERROR: Invalid Admin level");

        if(!IsPlayerConnected(id))
            return SendClientMessage(playerid, COLOR_RED, "ERROR: Player is not connected!");
        PlayerInfo[id][pAdmin] = AdminLevel;
        SendClientMessageEx(playerid, COLOR_LAWNGREEN, "You've just been made: %s admin level: %i", ReturnName(id), GetAdminRankName(id));
        SendClientMessageEx(targetid, COLOR_LAWNGREEN, "You've just been made admin level: %i by %s", GetAdminRankName(id), ReturnName(id));
    }
    else return SendClientMessage(playerid, COLOR_RED, "ERROR: You are not an Admin!");

    return 1;
}

You're using the function before the admin level.