需要 powershell 脚本方面的帮助

Question

请参阅下面的代码 ##如果用户输入 %100 或 a100 或非数字值作为 temp，我需要显示“错误：您必须输入数字值！” Write-host $("错误：您必须输入数值！") ## 然后返回开始 ##im 猜测 if ($value isnot [int]) 或类似的东西才能工作。谢谢。 ##如果没有正确编码，我会遇到错误......华氏温度是多少：a111 ##无法将值“a111”转换为类型“System.Single”。错误：“输入字符串的格式不正确。”

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)
}
}

Answer 1

您的脚本中有很多可以简化的冗余代码，最大的问题是使用 $input 这是一个自动变量，不应手动分配。至于从华氏温度转换为摄氏度的公式，您可以使用 函数 为此，除此之外，根据 Google 的说法，公式应该是 (X − 32) × 5 / 9我不是这方面的专家，请随意更改为您喜欢的内容。

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)
}