How can one get the result to a text file when print join is used?

[supriyoch_2008]

Hi PerlMonks,

I am interested to get the output of the following perl script (p.pl) to a text file. I have tried in several ways but I always get only the first two lines and not the actual permutations. FH does not work when I write it in between print and join. Usually FH is written between print and " and it nicely works. Here it does not. I am looking forward to perlmonks for suggestions.

Here goes the script p.pl:

#!/usr/bin/perl -l
use warnings;
use strict; 
use Algorithm::Permute;
###########################################################
# Opening file to write the program's output.
################################################### 
open(FH, ">myPer .txt") or die "Cannot open myPer .txt";
########################################################### 
my @arr = qw/A B C/; 
my $N=scalar(@arr); 
my $permu=2; 
my $p = new Algorithm::Permute([@arr], $permu);
print"\n WELCOME to Permutation Analysis:\n
 All Possible Permutations of $permu Elements out of $N .i.e. $N P $pe
+rmu:\n";
print FH "\n WELCOME to Permutation Analysis:\n
 All Possible Permutations of $permu Elements out of $N .i.e. $N P $pe
+rmu:\n";
 while (my(@res) = $p->next) {
    do {print join("", @res);};}
 while (my(@res) = $p->next) {
    do {print join("", @res);};} 
close FH; 
exit 0;

Here goes the incomplete output of text file myPer .txt:

WELCOME to Permutation Analysis:

 All Possible Permutations of 2 Elements out of 3 .i.e. 3 P2:

[roboticus]

supriyoch_2008:

If you want your output to go to the file, you need to say so. Change this:

print join("", @res);

to this:

print FH join("", @res);

...roboticus

When your only tool is a hammer, all problems look like your thumb.

[clueless newbie]

Or add a "select FH;" after the "open (FH...")

open(FH, ">myPer .txt") or die "Cannot open myPer .txt";
select FH;

[supriyoch_2008]

Hi clueless newbie,

Thanks for the code. It has worked and my problem is now over. The code is unique and simple.

With deep regards,

[supriyoch_2008]

Hi roboticus,

Thanks for the code. It has worked nicely and solved my problem.

Regards

[Corion]

Perl comes with extensive documentation. See the documentation for the print function.

[supriyoch_2008]

Hi Corion,

Thanks for your suggestions. I shall read the suggested text on print.

Regards

[marto]

I suggest you take the time to read the advice you're given, and actually spend time learning how to use the tools you've chosen. Re^3: How can one generate all possible permutations of r elements out of n where r<n?.