系统变量：存在服务器上的共享数字与字符串

-- 设置 / 读取（名称以引擎说明书为准）
SetSysInt("测试变量一", 12345)
print(GetSysInt("测试变量一"))  --> 12345

function LuaRun(actor, ...)
    local n = GetSysInt("全服跑步统计") or 0
    n = n + 1
    SetSysInt("全服跑步统计", n)
    print("全服已跑", n, "步")
end

function LuaRun(actor, ...)
    local n = (GetSysInt("跑步步数") or 0) + 1
    SetSysInt("跑步步数", n)
    if n > 10 then
        SetSysInt("跑步步数", 0)
        GiveItem(actor, "木剑", 1)
    end
end

SetSysStr("公告", "开服大吉")
print(GetSysStr("公告"))

local s = GetSysStr("计数")   -- 可能是 ""
-- s + 1  -- 空字符串不能直接当数字加

local s = GetSysStr("计数")
if s == "" then s = "0" end
local n = tonumber(s) or 0

local T = {1,2,3,4,5}
local json = TableToJson(T)      -- 名称以说明书为准
SetSysStr("存储表格", json)

local raw = GetSysStr("存储表格")
local T2 = JsonToTable(raw)
for k, v in pairs(T2) do
    print(k, v)
end

function LuaRun(actor, ...)
    local name = GetBaseInfo(actor, 1)
    local raw = GetSysStr("跑步榜")
    local t = (raw == "" or raw == nil) and {} or (JsonToTable(raw) or {})
    t[name] = (t[name] or 0) + 1
    SetSysStr("跑步榜", TableToJson(t))
    print(name, t[name])
end