需要有關powershell腳本的幫助-有解無憂

請參閱下面的代碼##如果用戶輸入 0 或 a100 或非數值的 temp，我需要顯示“錯誤：您必須輸入數值！” Write-host $("Error: You must enter a numeric Value!") ## 然后回傳開始 ##im 猜測是否 ($value isnot [int]) 或類似的東西才能作業。謝謝。##Error 我沒有正確編碼......華氏溫度是多少：a111 ##Cannot 將值“a111”轉換為型別“System.Single”。錯誤：“輸入字串的格式不正確。”

Write-Host("="*31)
Write-Host $("Fahrenheit to Celsius Converter")
Write-Host $("Script Written By Jesse  ")
Write-Host("="*31)

$value = (Read-Host("What is the temperature in Fahrenheit"))
$fahr = (($value  -32) /9) *5
Write-Host $("Fahrenheit", $value, "is equal to Celsius:", [Math]::Round($fahr,3))
$input = (Read-Host("Do you want to convert another Fahrenheit value? (1 = yes, 0 = no)?"))
Write-Host ("="*31)
        

while ($input)
{
    if ($input -eq 1)
    {
        Write-Host $("Fahrenheit to Celsius Converter")
        Write-Host $("Script Written By Jesse Nieto ")
        Write-Host ("="*31)
        $value = (Read-Host("What is the temperature in Fahrenheit"))
        $fahr = (($value -32) /9) *5
        Write-Host $("Fahrenheit", $value ,"is equal to Celsius:" ,[Math]::Round($fahr,3))
        $input = (Read-Host("Do you want to convert another Fahrenheit value? (1 = yes, 0 = no)?"))
        Write-Host("="*31)
    }
    elseif ($input -eq 0)
    {
        Write-Host $("Thank You. Bye! ")
        break
    }
    else
    {
        Write-Host $("Please enter a valid option! ")
        $input = (Read-Host ("Do you want to convert another Fahrenheit value? (1 = yes, 0 = no)?"))
        Write-Host ("="*31)
}
}

uj5u.com熱心網友回復：

你的腳本中有很多冗余代碼可以簡化，最大的問題是使用$input它是一個自動變數，不應該手動分配。至于從華氏溫度轉換為攝氏溫度的公式，你可以使用一個函式，除此之外，根據谷歌的說法，這個公式應該是(X ? 32) × 5 / 9雖然我不是這方面的專家，但你可以隨意改變。

function ConvertTo-Celsius {
    param([int]$Value)
    ($value - 32) * 5 / 9
}

:outer while($true) {
    $value = Read-Host "What is the temperature in Fahrenheit"
    try {
        $celsius = ConvertTo-Celsius $value
    }
    catch {
        # If input was invalid restart the loop
        Write-Host "Invalid input, only integers allowed!"
        continue
    }

    Write-Host "Fahrenheit $value°F is equal to $([math]::Round($celsius, 3))°C"
    do {
        $shouldExit = Read-Host "Do you want to convert another Fahrenheit value? (1 = yes, 0 = no)?"
        switch($shouldExit) {
            0 {
                Write-Host "Thank You. Bye!"
                break outer
            }
            1 { continue }
            Default { Write-Host "Please enter a valid option!" }
        }
    } until($shouldExit -eq 1)
}

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