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Re: My first perl script is working, what did I do wrong?

by eyepopslikeamosquito (Canon)
on Nov 09, 2012 at 07:13 UTC ( #1003075=note: print w/ replies, xml ) Need Help??

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  1. or download this
    if ($#ARGV != 0) {
         print "One, and only one (not $#ARGV), command line parameter is 
    +expected\n";
         exit;
    }
    
  2. or download this
    @ARGV == 1 or die "usage: $0 inputfile\n";
    
  3. or download this
    my $inputFile=$ARGV[0];
    
  4. or download this
    my $inputFile = shift;
    
  5. or download this
    if ( not -e $inputFile) {
         die "$inputFile doesn't exist!!!\nExiting.\n";
    }
    
  6. or download this
    -f $inputFile or die "input file '$inputFile' does not exist.\n";
    
  7. or download this
    open my $file, $inputFile or die "Could not open $inputFile: $!";
    
  8. or download this
    open my $file, '<', $inputFile or die "Could not open $inputFile: $!";
    

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