【入门夯实】Lua耐久曲线：裁决之杖磨损与修理费的线性计价

local function onHit(actor)
    local dur = getplayvar(actor, "DUR") - 1
    if dur <= 0 then
        setplayvar(actor, "DUR", 0)
        sendmsg(actor, 1, "裁决之杖已销毁")   -- 归零即销毁，误伤
    end
end

local function repair(actor)
    local dur = getplayvar(actor, "DUR") or 0
    local miss = 200 - dur
    local cost = math.floor(miss * 50)   -- 缺1点付50金
    if miss <= 0 then
        sendmsg(actor, 1, "裁决之杖无需修理")
        return
    end
    takeitem(actor, "金元", cost)
    setplayvar(actor, "DUR", 200)
    sendmsg(actor, 1, "修理花费 " .. cost .. " 金已满耐久")
end