File io Smalltalk：将输出写入文件

通常我会用我的输出把它写在成绩单上

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如何将输出写入文件？

要使用文件流吗

看

摘录如下：

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文件流 文件流支持所有ExternalStreams协议。它们可以创建为从文件读取、写入、读写或附加到文件。 创建：

* for reading:

      aStream := FileStream readonlyFileNamed:aFilenameString

* to read/write an existing file:

      aStream := FileStream oldFileNamed:aFilenameString

* to create a new file for writing:

      aStream := FileStream newFileNamed:aFilenameString

上面是内部低级别实例创建协议，使用该协议在政治上有点不正确。为了便于移植，请使用配套类文件名创建文件流：

* for reading:

      aStream := aFilenameString asFilename readStream

* to read/write an existing file:

      aStream := aFilenameString asFilename readWriteStream

* to create a new file for writing:

      aStream := aFilenameString asFilename writeStream

* to append to an existing file:

      aStream := aFilenameString asFilename appendingWriteStream

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当然，如果您不是在编写二进制或默认编码，请不要忘记处理所需的字符编码。在Pharo/Squeak中，将转换器设置为所需的TextConverter子类

| fileName aStream |

fileName := (Filename named: 'stream.st').

aStream := fileName readAppendStream.

aStream nextPutAll: 'What is the best class I have ever taken?'.

aStream cr.

aStream flush.

aStream nextPutAll: 'It is the VisualWorks Intro class!'.

aStream close.