我是一名初学者,在 ComputerCraft (Minecraft) 中设计了一个 Lua 程序,该程序在玩家第一次使用时询问他们的名字,并记录下来。现在,我想要一个程序来检测变量firstname
是否等于 nil,如果是则询问名称。如果变量不等于 nil,则表示您不需要注册。我目前只有在从主菜单register()
按下后才打电话。5
问题是每次我firstname
在提示时分配一个字符串时,firstname
当主菜单出现时返回为零。我什至把它放在print(firstname)
菜单的末尾来测试它。
我假设这是由于这一切都运行的并行功能。我并行运行MainMenu()
,Controls()
以便我可以同时收听键盘输入和红石输入。
如何在保留变量的同时保持功能监听和菜单工作?
这是完整的代码:
rednet.open("back") --Opens rednet on the back side of computer
local innerdooropen = false --Stuff to do with the airlock
local outerdooropen = false
function reset() --A handy function for screen reset
term.clear()
term.setCursorPos(1,1)
end
local function register() --This is the registration menu system
if firstname == nil then
print "Welcome to Obsidian Station!"
print "You must register before entering"
print "Please type your first name"
local firstname = read()
if firstname ~= "" then
print("Enter your last name")
local lastname = read()
print("You are now registered "..firstname.." "..lastname)
sleep(3)
rednet.broadcast(firstname.." "..lastname)
elseif firstname == "" then
print "You must register to enter"
shell.run("startup")
end
end
if firstname ~= nil then
print("Registration Not Needed")
sleep(2)
end
end
--Beginning of Section You Don't Have to Read
local function MainMenu()
while true do
term.clear()
term.setCursorPos(1, 1)
if innerdooropen == true then
rs.setOutput("left", false)
end
if outerdooropen == true then
rs.setOutput("right", false)
end
if innerdooropen == false then
rs.setOutput("left", true)
end
if outerdooropen == false then
rs.setOutput("right", true)
end
print "Safety Airlock Control"
print "~~~~~~~~~~~~~~~~~~~~~~"
print "[1] Open Outer Door"
print "[2] Open Inner Door"
print "[3] Close Both Doors"
print ""
print "[4] Open Both Doors - WARNING! DANGEROUS!"
print ""
print "[5] Register"
print(firstname)
input = read()
if input == "2" then
print "Inner Door Open"
outerdooropen = false
sleep "1"
innerdooropen = true
end
if input == "1" then
print "Outer Door Open"
innerdooropen = false
sleep "1"
outerdooropen = true
end
if input == "3" then
print "Both Doors Closed"
innerdooropen = false
outerdooropen = false
end
if input == "5" then
reset()
register()
end
if input == "6" then
print("firstname: "..firstname)
sleep(3)
end
if input == "4" then
term.clear()
term.setCursorPos(1, 1)
print "CONFIRM BOTH DOORS OPEN? [y] [n]"
input = read()
if input == "y" then
print "OPENING AIRLOCK DOORS IN"
sleep "1"
print "10"
sleep "1"
print "9"
sleep "1"
print "8"
sleep "1"
print "7"
sleep "1"
print "6"
sleep "1"
print "5"
sleep "1"
print "4"
sleep "1"
print "3"
sleep "1"
print "2"
sleep "1"
print "1"
sleep "1"
innerdooropen = true
outerdooropen = true
print "DOORS OPEN"
sleep "1"
end
elseif input == "n" then
term.clear()
term.setCursorPos(1, 1)
shell.run("startup")
end
end
end
--end of section you don't have to read
local function Controls()
while true do
local e = os.pullEvent()
if e == "redstone" and rs.getInput("bottom") then
redstone.setOutput ("left", true)
sleep "1"
redstone.setOutput ("right", false)
innerdooropen = true
outerdooropen = false
end
end
end
while true do
parallel.waitForAll(MainMenu,Controls)
end