In Perl, you can read a file line by line without the need to load the whole file first. Use the diamond operator in a while loop (untested code): 
open my $IN, '<', 'quoteout.dat' or die "$!";

my $searching_for_G;

while (<$IN>) {
    $searching_for_G = 1      if 0 == index $_, 'E';
    die "Error: h at line $." if $searching_for_G and 0 == index $_, '
+h';
    if ($searching_for_G and 0 == index $_, 'G') {
        print "Found G at line $.\n";
        undef $searching_for_G;
    }
}

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Note that unlike in C, a string is not an array of characters in Perl (that's why I used index). Also, you did not specify what to do if G is found - should the program end or search for another E? I assumed the latter.

$. contains the input line number. See perlvar for details.

لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Reading file and matching lines by choroba
in thread Reading file and matching lines by Jalcock501

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