Like pg said, you need to show us the rest of your code. In lieu of that, I'm guessing you call this sub actions before the initializing code

my $num = 0;
my $status_count = 0;
my $status_goal = 0;
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For example, examine how the following code runs:

use strict;
use warnings;

print_foo();

my $foo = "bar\n";

sub print_foo {
    print $foo;
}

print_foo();
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The first call to the sub throws the uninitialized error because the statement my $foo = "bar\n"; hasn't been executed yet. By the second call, that statement has been executed, so there is no warning.