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the last line of a large file [message #55246]

Thu, 09 August 2007 12:49

queiny
Messages: 15
Registered: November 2005

Junior Member

Hi,

I am processing a large file with data in the same format till the
last line. In the last line, it states how many records are included
in this file.

So the structure of my program is:

while not eof(in_unit) do begin
readf, in_unit, input_line
if( input_line ne 'last line) then begin
.....
else
....
endif
endwhile

Do I have to use 'if/then' to test whether every input_line is the
last line of the file? Since there are many data records in the file,
repeat calls to 'if/then' can be time consuming. But if I don't do the
test, the program will be halted when it read in the last line.

A Easy way I can think of is to delete the last line, but sometime we
are not supposed to change the input files.

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[Message index]

		the last line of a large file By: queiny on Thu, 09 August 2007 12:49
		Re: the last line of a large file By: David Fanning on Tue, 14 August 2007 10:42
		Re: the last line of a large file By: queiny on Tue, 14 August 2007 10:22
		Re: the last line of a large file By: little davey on Fri, 10 August 2007 14:15
		Re: the last line of a large file By: James Kuyper on Fri, 10 August 2007 10:39
		Re: the last line of a large file By: Conor on Fri, 10 August 2007 08:51

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