Hello monks, I have a question/problem concerning a printf in an if-statement. In the following code I am going through a file with data in time. Some of this data is worthless which is represented by a file holding the start and endtimes of these worthless timespans in epoch seconds($gapsfile). For each day I want to calculate the number of gaps as well and print these to file. However for some reason the printf in the if-statement which checks if a next day begins ( if(! ($julday == $julday_old)) ) does not work. It does print to filehandle OUT1 before the if statement. The print statements, printing the same variables to standard output in the if-statement do function as well. I am confused.....?? thanks in advance! 
my $error_cnt = 0;
my $day_cnt = 0;
my $month = 0;
my $test;
my $julday_old;
open(OUT,">$resultsfile.corrected");
open(OUT1,">$resultsfile.gaps");
open(INP, $resultsfile);
while (<INP>){
  chomp($_);
  my $line = $_;
  my ($timestr,$timebin,$fish,$vel,$azi,$px,$py) = split(/\s+/,$line);
  my ($year,$julday,$hour,$min,$sec,$msec) = split(/\./,$timestr);
  my $timest = timegm_nocheck($sec,$min,$hour,$julday,$month,$year);
  my $timeend = $timest + 512;
  $julday_old = $julday if $. == 1;
  #$test = sprintf"%s %s\n",$julday_old,$day_cnt if $. != 1;
  #printf OUT1 "%s",$test;
  if(! ($julday == $julday_old)){
    printf OUT1 "%s %s\n",$julday_old,$day_cnt;
    print "$julday_old  ";
    print "$day_cnt\n";
    $julday_old = $julday;
    $day_cnt = 0;
  }
  open(IN,"$gapsfile");
  while (<IN>){
    chomp($_);
    my ($sttime,$endtime) = split(/\s+/,$_);
    if ($sttime < $timest && $endtime > $timeend){
      print "Timespan $timestr will be removed\n";
        $day_cnt++;
        $error_cnt++;
        last;
    }
    elsif ($endtime > $timest+3.2 && $endtime < $timeend){
      print "Timespan $timestr will be removed\n";
      $day_cnt++;
      $error_cnt++;
      last;
    }
    elsif ($sttime+3.2 < $timeend && $sttime > $timest){
      print "Timespan $timestr will be removed\n";
      $day_cnt++;
      $error_cnt++;
      last;
    }
    else{
      printf OUT "$line\n";
    }
  }
  close(IN);
}
close(OUT);                                                           
+ close(OUT1);
print "\n\nTotal number of timespans of 8m 32s removed is: $error_cnt\
+n";
close(INP);

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In reply to printf in if-statement by Utrecht

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