Hi guys I am very new to perl and programming in general. I have a question about getting the amount of days between two dates. I do not want to use any modules- (just A LOT of code). Here is my code so far any advice for me.? I cant get my head around trying to get the right number of days in different years- as you will see in the code 

 #!/usr/bin/perl
use strict;
use warnings;

print "please enter day of birth: ";
my $d = <STDIN>;
print "please enter month of birth: ";
my $m = <STDIN>;
print "please enter year of birth: ";
my $y = <STDIN>;
chomp($d, $m,$y);#strip newlines

print "please enter current day: ";
my $cd = <STDIN>;
print "please enter current month: ";
my $cm = <STDIN>;
print "please enter current year: ";
my $cy = <STDIN>;
chomp($cd, $cm,$cy);
my$days=0;
if ($y>$cy){
warn "Birth Year Cannot be after the current year.";
}
elsif ($y==$cy){
    $days= $days + NumberOfDaysBetween($d,$cd ,$m,$cm );
    print "$days";
}
else {
my$years= ($cy-$y) * 365;
$days= $days + NumberOfDaysBetween($d,31,$m,12) + NumberOfDaysBetween(
+1,$cd,1,$cm) + $years;
    print "war war$days";
}
sub NumberOfDaysBetween
{
my$daysBetween;
my$startDay=shift;
my$endDay=shift;
my$sMon=shift;
my$eMon=shift;
if ($y <= $cy){
    if ($sMon > $eMon || $sMon == $eMon&& $startDay > $endDay){
    print "invalid input";
}

    elsif ($sMon == $eMon && $startDay<= $endDay){
    $daysBetween = $endDay- $startDay;
    }
    else {
        $daysBetween =((&NumberOfDaysInMonth($sMon))-($startDay-1)) + 
+$endDay + &cumulativeDaysInMonths($sMon,$eMon);
}
}
return $daysBetween;
}
sub NumberOfDaysInMonth
{
my $mon=shift;
my$numOfDaysInMonth;
if ($mon == 2) {
    $numOfDaysInMonth = 28;
}
elsif ($mon == 9|| $mon == 4|| $mon == 6|| $mon == 11) {
    $numOfDaysInMonth = 30;
}
else {
    $numOfDaysInMonth = 31;
}
return $numOfDaysInMonth;
}

sub cumulativeDaysInMonths
{
my $sMonth=shift;
my $eMonth=shift;
my$daysRange=0;
$eMonth--;
while ($eMonth>$sMonth){
$daysRange=$daysRange + NumberOfDaysInMonth($eMonth);
$eMonth--
}
return$daysRange;

}

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In reply to perl basic count days between two dates by scripter87

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