【入门夯实】可选项配置：Lua默认参数的替代写法

local function feedBad(actor, count = 1)
    sendmsg(actor, 1, "喂食 " .. count .. " 份兽粮")
end

local function feedPet(actor, count)
    actor = getplayerbyname(actor)
    count = count or 1
    if not takeitem(actor, "兽粮", count) then
        sendmsg(actor, 1, "兽粮不足：需要 " .. count .. " 份。")
        return
    end
    sendmsg(actor, 1, "喂食 " .. count .. " 份，白虎饱食度回升。")
end
local function summon(opts)
    opts = opts or {}
    local level = opts.level or 1
    local withEffect = opts.effect or false
    sendmsg(nil, 1, "召唤等级 " .. level .. "，特效 " .. tostring(withEffect))
end

local function normalizeOpts(opts)
    opts = opts or {}
    opts.level = math.max(1, math.min(10, tonumber(opts.level) or 1))
    return opts
end