Input (File Mode)
Specifies text file to be opened for input mode
filename
A file mode used with Open to open a text file for reading.
This mode allows to read sequentially lines of text with Line Input #, or to read comma separated values with Input #.
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, an error is issued. 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.
Syntax
Parameters
filename
file name to open for input
encoding_typeindicates encoding type for the file
lock_typelocking to be used while the file is open
filenumunused file number to associate with the open file
Description
A file mode used with Open to open a text file for reading.
This mode allows to read sequentially lines of text with Line Input #, or to read comma separated values with Input #.
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, an error is issued. 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)
- 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)
Example
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
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
