【入门夯实】爆率对不上账：math.random边界取值的inclusive陷阱

local function rollBad(actor)
    if math.random(5000) == 0 then
        giveitem(actor, "裁决之杖", 1)
    end
end

local function rollDrop(actor)
    actor = getplayerbyname(actor)
    if math.random(1, 5000) == 1 then
        giveitem(actor, "裁决之杖", 1)
        sendcentermsg(actor, 255, 215, "白野猪倒下，裁决之杖现世！", 0, 8)
    else
        giveitem(actor, "金创药", 1)
    end
end

local function selfTest()
    local hit = 0
    for _ = 1, 50000 do
        if math.random(1, 5000) == 1 then
            hit = hit + 1
        end
    end
    sendmsg(nil, 1, "5万次抽样命中 " .. hit .. " 次，期望约 10 次。")
end

local function rollSegment(actor)
    actor = getplayerbyname(actor)
    local roll = math.random(1, 100)
    if roll <= 60 then
        giveitem(actor, "金创药", 2)
    elseif roll <= 95 then
        giveitem(actor, "祝福油", 1)
    else
        giveitem(actor, "裁决之杖碎片", 1)
    end
end