Hi, I have been playing around with loops in perl and I have come across something that I don't understand. I have put together the following code to illustrate this (it is not part of a real program). 

# floor1.txt
# This files contains info about floor 1.

# floor2.txt
# This files contains info about floor 2.

# floor3.txt
# This files contains info about floor 3.

use strict;
use warnings;

my @buildings = qw(building1 building2);
my @floors = qw(floor1 floor2 floor3);
my $current_building;
my $floorfile;

foreach (@buildings)
  {
  $current_building = $_;
  print "$current_building\n\n";
  foreach (@floors)
    {
    $floorfile = $_ . ".txt";
    print "$_\n";
# Why does the while loop, below, mess up the 2nd iteration of the for
+each?
#    open FLOORFILE, $floorfile or die $!;
#    while (<FLOORFILE>) 
#      {
#      print "$_\n";
#      }
    }
  print "\n\n"; 
  }

[download]
As shown in the comments I have 3 text files (floor1.txt etc) which just contain a single line of text. When the while loop is commented out (as above) both foreach loops work fine and print out 3 floors on building 1 and 2, but when I try to use the content of the floor text files the code fails when it gets to building 2. What obvious thing am I missing here? Regards, Andy.

In reply to Problem with while loop inside a foreach loop by andylevel2

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