I've written some code that (I think) does what you want. Being new to Perl, it will probably take you some study before you understand the nested structures (array of arrays, which are done with references). I recommend perldoc perlreftut. 
# This is an "array of arrays". Each row is one set of ranges,
# a pair of Xs and a pair of Ys
my @ranges = ([-180, -170, -130, -120],
              [-180, -170, -110, -105]);

# This array is going to store the counts for each row of @ranges
# It is initialized to zero for each row
my @range_counts = (0) x @ranges;

# This reads default input: file(s) on command-line or STDIN
while (<>) {
  # split the line on whitespace
  my ($x, $y) = split;
  # Count through the rows in @ranges
  for my $R (0..$#ranges) {
    # Compare
    if ($x >= $ranges[$R][0] and $x < $ranges[$R][1]
        and $y >= $ranges[$R][2] and $y < $ranges[$R][3]) {
      # Increment counter
      ++$range_counts[$R];
    }
  }
}

# Go through the rows in @ranges again, printing them and the
# corresponding count
for my $R (0..$#ranges) {
  printf "(%d..%d, %d..%d): %d\n", @{$ranges[$R]}, $range_counts[$R];
}

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Caution: Contents may have been coded under pressure.

In reply to Re: headache with arrays. by Roy Johnson
in thread headache with arrays. by Anonymous Monk

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