To get you started, have a look at open, readline and close for your file handling. The three-argument form of open using lexical filehandles and testing for success (mention $!, O/S error, on failure) is recommended practice. E.g.

my $inputFile = q{xyz.txt};
open my $inputFH, q{<}, $inputFile
   or die qq{open: < $inputFile: $!\n};
my $outputFile = q{abc.txt};
open my $outputFH, q{>}, $outputFile
   or die qq{open: > $outputFile: $!\n};
[download]

Read your files in a while loop line by line, either into the default pattern space, $_ (see perlvar) or a lexical scalar. Consider whether to remove line terminators using chomp. E.g.

# Reading lines into $_ in a while loop and removing
# line terminator
while( <$inputFH> )
{
    chomp;  # Acts on $_ by default
    ...     # Rest of your line-processing code here
}
[download]

Extracting the data fields could be done using regular expressions, have a look at perlretut and perlre. Consider using global matching in File 2 to extract a series of name data into an array. This pattern (not tested) looks like it will match data for one name, the whole data including the name captured in $1, the name alone in $2

my $rxExtractNameData = qr
   {(?x)
       (
           \s+
           (\w+)
           \s+
           \([A-Z]\)
           \s+
           \(\d*%\)
           \s+
           \d+\s+\+\s+[+-]?\d+
       )
   };
[download]

Have a crack at putting some of these ideas together. Build your script gradually, first just getting it to open and close File 1 and, when that works, read the lines and extract the names (and numbers if necessary, do the numbers in File 1 have to match those in File 2?). If you encounter difficulties come back to the Monastery with more questions.

I hope these thoughts are helpful

Cheers,

JohnGG

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