printf "%d duplicate records written\n",$name,$para,$out_filename;

see printf and sprintf. You need to put %s in the print format for strings, %d for integers

while ( my $para = <$PROTFILE> ) { 
  # Remove fasta header line 
  if ( $para =~ s/^>(.*)//m ){ 
    $name = $1; 
  }; 
  # Remove comment line(s) 
  $para =~ s/^\s*#.*//mg; 
  # Trim trailing white space 
  $para =~ s/\s+$//; 
  # next FASTA_RECORD if $fasta_seen{ $para }++; 
  if ( $fasta_seen{ $para }++ ){ 
    printf "duplicate record %s %s \nwritten to %s\n",$name,$para,$out
+_filename; 
    print $OUTFILE '>'.$name.$para."\n\n";
  } 
}

[download]
poj

In reply to Re^20: how to read input from a file, one section at a time? by poj
in thread how to read input from a file, one section at a time? by davi54

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.