Lua元音统计：五个元音的分支计数

local function vowelCount(s)
    local n = 0
    local low = string.lower(s)
    for ch in low:gmatch("[aeiou]") do
        n = n + 1
    end
    return n
end

local function vowelDetail(s)
    local t = {a = 0, e = 0, i = 0, o = 0, u = 0}
    for ch in string.lower(s):gmatch("%l") do
        if t[ch] then t[ch] = t[ch] + 1 end
    end
    return t
end
local p = getplayerbyname("vowel01")
local t = vowelDetail("Engine And M2")
sendmsg(p, 1, "e 出现 " .. t.e .. " 次")