玩家转职系统：职业变更的转职试炼

local JOBS = {"战士", "法师", "道士"}
local function changeJob(actor, newJob)
    local lv = getplayvar(actor, "LEVEL") or 0
    if lv < 40 then
        sendmsg(actor, 1, "转职需 40 级")
        return
    end
    local old = getplayvar(actor, "JOB")
    if old == newJob then
        sendmsg(actor, 1, "已是该职业")
        return
    end
    setplayvar(actor, "JOB", newJob)
    setplayvar(actor, "skillPts", lv * 2)
    sendmsg(actor, 1, "转职为 " .. newJob
        .. "，技能点重置为 " .. lv * 2)
end

local function queryJob(actor)
    sendmsg(actor, 1, "当前职业 " ..
        (getplayvar(actor, "JOB") or "未选择"))
end