下面是我试图编写的powershell脚本。问题是当我调用Validate-Response方法时，变量$ playGame和$ validResponse会保持重置它们的值，即使在方法Validate-Response中明确指出如果用户输入“Y”，它们都设置为true。帮助
所引用的方法是：
function Validate-Response{
$validResponse
if ($response -eq "Y"){
$validResponse = "True"
$playGame = "True"
}
elseif ($response -eq "N") {
Clear-Host
Write-host " `n`n Please return and play again soon."
Read-Host exit
break
}
else {
Clear-Host
Write-Host "`n`n Invalid input. Please press Enter try again."
Read-Host
$validResponse = "False"
}
return $validResponse, $playGame
}
整个计划：
#Define variables used in this script
$playGame
#Controls gameplay and when to stop gameplay
$response = ""
#Stores the player’s input when prompted to play a game
$number = 0
#Stores the game’s randomly generated number
$secretWord = ""
#Stores the secret word for the current round of play
$attempts = 0
#Keeps track of the number of valid guesses made
$status = "True"
#Controls the current round of play
$guesses = ""
#Stores a list of letters by the player during gameplay
$reply
#Stores player letter guesses
$tempstring
#Stores a display string, with hidden characters, that is used
#to represent the secret word during gameplay
$validReply
#Stores the player’s response when prompted to play a new game
$validResponse
#String listing unacceptable input
$GuessesRemaining
#Keeps track of the number of guesses the player has left
#Create an Associative array and load it with words
$words = @{}
$words[0] = @("", "", "", "", "", "", "", "", "", "", "", "", "", "", "")
$words[1] = @("C", "O", "M", "M", "A", "N", "D", "E", "R")
$words[2] = @("F", "L", "A", "G")
$words[3] = @("T", "O", "A", "S", "T", "E", "R")
$words[4] = @("M", "A", "R", "K", "E", "R")
$words[5] = @("P", "I", "C", "T", "U", "R", "E")
$words[6] = @("D", "E", "S", "K")
$words[7] = @("G", "L", "O", "B", "E")
$words[8] = @("S", "P", "E", "A", "K", "E", "R")
$words[9] = @("B", "A", "C", "K", "Y", "A", "R", "D")
$words[10] = @("P", "E", "N", "C", "I", "L")
#This function determines if the player’s guess is correct or incorrect
function Check-Answer {
param ($reply) #Argument containing the player’s guess
#Access script-level variable representing valid users guesses and
#add the current guess to it
$script:guesses = $script:guesses + " " + $reply
#Loop through each letter in the secret word (e.g., each element in the
#array) and see if it matches the player’s guess
for ($i = 0; $i -le $secretWord.length - 1; $i++) {
if ($secretWord[$i] -ne $reply) {
#The guess does not match
#Place an underscore character into $word[0] in place of the letter
if ($words[0][$i] -eq "") {$words[0][$i] = "_"}
}
else
{ #The guess matches #Place the letter being guessed into $word[0]
$words[0][$i] = $reply
}
}
}
function Validate-Answer{
param ($reply)
$validReply = "False"
if ($reply -eq "") {
#If an empty string was submitted, repeat the loop
continue
}
#It is time to validate player input
elseif ($reply.Length -gt 1) {
#Limit input to one character at a time
Clear-Host #Clear the Windows command console screen
Write-Host "`n`n Error: You may enter only one letter at a time."
Read-Host "`n`n`n`n`n`n`n`n`n`n`n Press Enter to continue."
$reply = "" #Clear out the player’s input
continue # Repeat the loop
}
elseif (1234567890 –match $reply) {
#Numeric input is not allowed
Clear-Host #Clear the Windows command console screen
Write-Host "`n`n Error: Numeric guesses are not allowed."
Read-Host "`n`n`n`n`n`n`n`n`n`n`n Press Enter to continue."
$reply = "" #Clear out the player’s input
continue #Repeat the loop
}
elseif ($rejectList -match $reply) {
Clear-Host #Clear the Windows command console screen
Write-Host "`n`n Error: Special characters are not permitted."
Read-Host "`n`n`n`n`n`n`n`n`n`n`n Press Enter to continue."
$reply = "" #Clear out the player’s input
continue #Repeat the loop
}
else{
$validReply = "True"
}
}
#Prompt the player to guess a number
while ($playGame -ne "True") {
Clear-Host
#Clear the Windows command console screen
#Display the game’s opening screen
Write-Host "`n`n`n`n"
write-Host " Welcome to the *********"
Write-Host " * *"
Write-host " PowerShell Hangman Game! O *"
Write-host " __|__ *"
Write-host " | *"
Write-host " / \ *"
Write-host " *"
Write-host " *"
Write-host " *"
Write-host " *******"
#Collect the player’s guess
while ($validResponse -eq "False"){
$response = Read-Host "`n`n`n`n`n`n`n`n Would you like to play? (Y/N)"
Validate-Response $reponse
}
}
#Prompt the player to guess a number
while ($status -eq "True") {
#Reset variables at the beginning of each new round of play
$tempString = ""
$words[0] = @("", "", "", "", "", "", "", "", "", "", "", "", "", "", "")
$attempts = 0
$guesses = ""
$reply = ""
#Generate a random number between 1 and 10
$number = Get-Random -minimum 1 -maximum 11
$secretWord = $words[$number]
#Populate an array with the letters that
#make up the game’s secret word using the
#random number to specify the array index
#Create a loop to collect and analyze player input
while ($validReply -eq "False") {
Clear-Host #Clear the Windows command console scre
$reply = Read-Host "`n`n Enter a guess" #Collect the player answeren
Validate-Answer $reply
Clear-Host #Clear the Windows command console screen
$attempts++ #Only increment for good guesses
#Now that player input has been validated, call on the Check-Answer #function to process the input
Check-Answer $reply
$tempString = "" #Clear out this variable used to display the current state of the word being guessed
#Loop through $words[0] and create a temporary display string that
#shows the state of the word being guessed
for ($i = 0; $i -le $words[0].length - 1; $i++) {
$tempString = $tempString + " " + $words[0][$i]
}
#Display the current state of the secret word based on the input
#collected from the player
Write-Host "`n`n Results:`n"
Write-Host " ----------------------------------------- -`n"
Write-Host " $tempString`n"
Write-Host " ------------------------------------------`n`n"
Write-Host " Letters that have been guessed: $guesses`n"
#Calculate the number of guesses that the player has left
$GuessesRemaining = (12 - $attempts)
#Display the number of guesses remaining in the current round of play
Write-Host " Number of guesses remaining: $GuessesRemaining"
#Pause the game to allow the player to review the game’s status
Read-Host "`n`n`n`n`n`n`n`n`n Press Enter to continue"
if ($tempString -notmatch "_") {
Write-Host "`n Game over. You have guessed the secret word!" ` "in $attempts guesses.`n`n"
Write-Host " The secret word was $secretWord `n`n"
Write-Host "`n`n`n`n`n`n`n`n" ` "`n`n`n`n`n`n`n"
Read-Host #Pause gameplay
$reply = "Done" #Signal the end of the current round of play
break #Repeat the loop
} #The player is only allowed 12 guesses, after which the game ends
if ($attempts -eq 12) {
Clear-Host Write-Host "`n Game over. You have exceeded the maximum allowed" ` "number of guesses.`n`n"
Write-Host " The secret word was $secretWord `n`n"
Write-Host " The best you could do was $tempString`n`n`n`n`n`n`n`n" ` "`n`n`n`n`n`n`n"
Read-Host #Pause the game
$reply = "Done" #signal the end of the current round of play
break #Repeat the loop
}
$reply = "" #Clear out the player’s input
}
$response = "" #Reset value to allow the loop to continue iterating
#It is time to prompt the player to play another round
$validReply = "False" #Set variable to ready its use in the while loop
#Loop until valid input is received
while ($validReply -ne "True") {
Clear-Host #Clear the Windows command console screen
#Prompt the player to play a new game
$response = Read-Host "`n`n Play again? (Y/N)"
#Validate the player’s input
#Keep playing
if ($response -eq "Y"){
$validReply = "True"
$status = "True"
}
elseif ($response -eq "N") { #Time to quit
Clear-Host #Clear the Windows command console screen
Write-host " `n`n Please return and play again soon."
Read-Host #Pause gameplay
$validReply = "True"
$status = "False"
}
else { #Invalid input received
Clear-Host #Clear the Windows command console screen
Write-Host "`n`n Invalid input. Please press Enter to try again."
$validReply = "False"
Read-Host #Pause gameplay
}
}
}
答案 0 :(得分：1)
您的功能Validate-Response不接受任何输入，而您的$playGame和$validResponse变量不是全局变量。
将这些变量传递到您的函数中或使它们成为全局变量。
以下是一些帮助您了解功能和变量的链接：
Functions
Create Your Own PowerShell Functions
How Scopes Affect PowerShell Scripts
$global:varName
function funcName($arg) {
<script block>
}