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#!/usr/bin/env perl
use strict;
use warnings;
use experimental qw{ bitwise fc postderef say signatures state };
use List::Util qw{max};
my @examples = (
{ str => "perl", char => "e" },
{ str => "java", char => "a" },
{ str => "python", char => "m" },
{ str => "ada", char => "a" },
{ str => "ballerina", char => "l" },
{ str => "analitik", char => "k" },
);
for my $example (@examples) {
my $char = $example->{char};
my $str = $example->{str};
my @str = split //, $str;
my $count = scalar grep { $_ eq $char } @str;
my $total = scalar @str;
my $output = round( 100 * $count / $total );
say <<"END";
Input: \$str = "$str", \$char = "$char"
Output: "$output"
END
}
sub round ($number) {
my $int = int $number;
return $number if $number == $int;
my $r = $number - $int;
return $r < 0.5 ? $int : $int + 1;
}
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