fselect
fselect |
Purpose
Synopsis
procedure fselect(stream:integer)
Argument
|
stream
|
The stream number
|
Example
The following saves the file ID of the default output before switching output to the file
mylog.txt. Subsequently, the file ID of the current output stream is saved and the default output is again selected.
def_out:= getfid(F_OUTPUT)
fopen("mylog.txt", F_OUTPUT)
...
my_out:= getfid(F_OUTPUT)
fselect(def_out)
Further information
1. This procedure selects the given stream as the active input, output or error stream. The concerned stream is designated by the opening status of the given stream (that is, if the given stream has been opened for reading, it will be assigned to the default input stream). The stream number can be obtained with the function
getfid.
2. The default input, output and error streams have respectively numbers 0, 1 and 2.
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