Question

首先，我想指出我可以用不正确的方式翻译错误信息......这个错误是什么？我该如何编写代码？

    [EntryPoint]
    let Main (args:string[]) =
            let start = startServer (args.[0]) 
            Console.Read()

我不明白我该怎么做才能让编译器满意。以下代码段是否正确？

let rec handle =
       let handler = socket.Accept()   
       let rec recieveData =
           let bytesRec = handler.Receive(bytes)
           let data = Encoding.ASCII.GetString(bytes,0,bytesRec)
           Console.WriteLine( "Text received : {0}", data)
       Console.Read()
   0

Answer 1

[<EntryPoint>]
let Main (args : string[]) =
    let start = startServer args.[0]
    Console.Read()

Answer 2

我无法分辨你的代码应该做什么，因为它有外部依赖性，但至少你的问题是缩进：F＃中的空格是重要的，特别是在确定词法范围方面起着重要作用。所以对于初学者你需要修复缩进，比如

[EntryPoint]
let Main (args:string[]) =
    let start = startServer (args.[0]) 
    Console.Read()

let rec handle =
   let handler = socket.Accept()   
   let rec recieveData =
       let bytesRec = handler.Receive(bytes)
       let data = Encoding.ASCII.GetString(bytes,0,bytesRec)
       Console.WriteLine( "Text received : {0}", data)
   Console.Read()
   0

此外，如果不正确，您的rec值的使用似乎是不必要的。奇怪的是，你在handle let表达式的主体中执行大量工作只是为了将它绑定到0 ...你的意思是handle或recieveData来是功能？如果是这样，你可能想要更像

的东西

let handle socket = //make handle a function with socket an explicit dependency
   let handler = socket.Accept()
   let bytesRec = handler.Receive(bytes)
   let data = Encoding.ASCII.GetString(bytes,0,bytesRec)
   Console.WriteLine( "Text received : {0}", data)
   Console.Read() |> ignore //probably you are using Read to wait for user interaction to continue, but just ignore the result (returning unit) instead of returning 0

阻止，'let'之后的跟进没有完成。需要声明

2 个答案: