From bug-octave-request at bevo dot che dot wisc dot edu Sun Jan  5 15:29:04 2003
Subject: Error in fscanf %i  and %f for pipes
From: Bruce Moore <bwmoore22 at yahoo dot com>
To: bug-octave at bevo dot che dot wisc dot edu
Date: Sun, 5 Jan 2003 13:28:41 -0800 (PST)

When reading from a pipe, fscanf does not correctly
interpret the %i and %f formats on 2.1.39.

A test script is 


fh = popen("cat test.dat","r")
[i1,i2,i3] = fscanf(fh,"%i %i %i\n","C")
tval = i1*i2
[s1,s2,s3] = fscanf(fh,"%s %s %s\n","C")
i1 = str2num(s1);
i2 = str2num(s2);
tval = i1*i2
pclose(fh)


Data file is

1 2 3
4 5 6
7 8 9.0e3

output is

octave:22> test
fh =
{
  id = 7
  name = cat test.dat
  mode = r
  arch = native
  status = open
}
i1 = [](0x0)
i2 = [](0x0)
i3 = [](0x0)
tval = [](0x0)
s1 = 2
s2 = 3
s3 = 4
tval = 6
ans = 0
octave:23> 



The actual pipe command that I'm using is a PERL
script to run SQL statements against a DB2 database. 
The "cat" command is just an easy test case.




=====
Bruce Moore

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