OUTPUT


Specifies text file to be opened for output mode

Syntax:
open filename for Output [encoding encoding_type] [lock lock_type] as [#]filenum

Parameters:
filename
file name to open for output
encoding_type
indicates encoding type for the file
lock_type
locking to be used while the file is open
filenum
unused file number to associate with the open file

Description:
A file mode used with Open to open a text file for writing.

This mode is used to write text with Print #, or comma separated values with Write #.

Text files can't be simultaneously read and written in FreeBASIC, so if both functions are required on the same file, it must be opened twice.

filename must be a string expression resulting in a legal file name in the target OS, without wildcards. The file will be sought for in the present directory, unless the filename contains a path . If the file does not exist, it is created. The pointer is set at the first character of the file.

Encoding_type indicates the Unicode Encoding of the file, so characters are correctly read. If omitted, "ascii" encoding is defaulted. Only little endian character encodings are supported at the moment.
  • "utf8"
  • "utf16"
  • "utf32"
  • "ascii" (the default)

Lock_type indicates the way the file is locked for other processes, it is one of:
  • Read - the file can be opened simultaneously by other processes, but not for reading
  • Write - the file can be opened simultaneously by other processes, but not for writing
  • Read Write - the file cannot be opened simultaneously by other processes (the default)

filenum Is a valid FreeBASIC file number (in the range 1..255) not being used for any other file presently open. The file number identifies the file for the rest of file operations. A free file number can be found using the Freefile function.

Examples:
Dim ff As UByte
Dim randomvar As Integer
Dim name_str As String
Dim age_ubyte As UByte

ff = FreeFile
Input "What is your name? ",name_str
Input "What is your age? ",age_ubyte
Open "testfile" For Output As #ff
Write #ff, Int(Rnd(0)*42),name_str,age_ubyte
Close #ff
randomvar=0
name_str=""
age_ubyte=0

Open "testfile" For Input As #ff
Input #ff, randomvar,name_str,age_ubyte
Close #ff

Print "Random Number was: ", randomvar
Print "Your name is: " + name_str
Print "Your age is: " + Str(age_ubyte)

'File outputted by this sample will look like this,
'minus the comment of course:
'23,"Your Name",19


Differences from QB:


See also:
Back to File I/O Functions
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