用批处理抓取Windows版本信息

FOR /F "eol=; tokens=2,3* delims=," %i in (myfile.txt) do @echo %i %j %k

    would parse each line in myfile.txt, ignoring lines that begin with
    a semicolon,passing the 2nd and 3rd token from each line to the for
    body,with tokens delimited by commas and/or spaces.  Notice the for
    body statements reference %i to get the 2nd token, %j to get the
    3rd token,and %k to get all remaining tokens after the 3rd.  For
    file names that contain spaces, you need to quote the fil@R_607_8371@s with
    double quotes.  In order to use double quotes in this mAnner, you also
    need to use the useBACkq option, otherwise the double quotes will be
    interpreted as defining a literal String to parse.

    %i is explicitly declared in the for statement and the %j and %k
    are implicitly declared via the tokens= option.  You can specify up
    to 26 tokens via the tokens= line,provided it does not cause an
    attempt to declare a variable higher than the letter ‘z‘ or ‘Z‘.
    Remember,FOR variables are single-letter,case sensitive,global,
    and you can‘t have more than 52 @R_136_10586@l active at any one time.

    You can also use the FOR /F parsing logic on an immediate String, by
    making the file-set between the parenthesis a quoted String,
    using single quote characters.  It will be treated as a single line
    of input from a file and parsed.

    Finally,you can use the FOR /F command to parse the output of a
    command.  You do this by making the file-set between the
    parenthesis a BACk quoted String.  It will be treated as a command
    line,which is passed to a child CMD.EXE and the output is captured
    into memory and parsed as if it was a file.  So the following
    example:

      FOR /F "useBACkq delims==" %i IN (`set`) DO @echo %i

    would enumerate the environment variable names in the current
    environment.