This one is stumping me because of all the variables needed. Only thing
taught before this challenge was basic branches and loops. This is what
I have so far.
puts 'Leap Year Calculator'
puts ' '
puts 'Enter the starting year.'
starting_year = gets.chomp
puts 'Enter the ending year.'
ending_year = gets.chomp
while true
if starting_year % 400 ||starting_year % 4
leap_year = starting_year
elsif starting_year % 100
leap_year = starting_year + 4
else
# need something to check until it reaches / by 4 or 400, adding one
each time maybe.
end
while leap_year.to_i < ending_year.to_i
puts leap_year
leap_year = leap_year.to_i + 4
end
break
end
Works okay if I put a leap year, or one dividable by 100. But I'm not
sure how to do this when I enter a number not dividable by 100, 4, or
400 (Where I have the comment is where I think the code needs to go.)
Also what I'm using is all the book has gone over so far so please,
nothing not using what I'm using. Thanks in advance.
The rest doesn't work at all because if you put something like 2096-2104
you would print out 2096, 2100 which is incorrect in two ways
1) 2100 isn't a leap year
2) 2104 should be printed and your second while clause precludes that
You shouldn't be worrying about the starting year as much as you are - you
need to handle every leap year in the same fashion
So lets try something like this
leap_year = starting_year + starting_year % 4 #set yourself onto a possible
leap year to start with
while leap_year <= ending_year
if (leap_year % 100) != 0 || (leap_year % 400) == 0
puts leap_year
end
leap_year = leap_year + 4
end
And if for some reason you have a problem with the or statement ("||") you
can use this instead
if (leap_year % 100) != 0
puts leap_year
elsif (leap_year % 400) == 0
puts leap_year
end
John
···
On Thu, Mar 28, 2013 at 1:17 PM, Phil H. <lists@ruby-forum.com> wrote:
This one is stumping me because of all the variables needed. Only thing
taught before this challenge was basic branches and loops. This is what
I have so far.
puts 'Leap Year Calculator'
puts ' '
puts 'Enter the starting year.'
starting_year = gets.chomp
puts 'Enter the ending year.'
ending_year = gets.chomp
I just could not come to that simple conclusion. Yes we did learn about
OR, AND, and one other that escapes me. I though about that as well.
Also setting the leap year ,it wouldn't work unless I implicitly set it
to an integer. So my final code is:
puts 'Leap Year Calculator'
puts ' '
puts 'Enter the starting year.'
starting_year = gets.chomp
puts 'Enter the ending year.'
ending_year = gets.chomp
leap_year = starting_year.to_i + starting_year.to_i % 4
while leap_year.to_i <= ending_year.to_i
if (leap_year % 100) != 0 || (leap_year % 400) == 0
puts leap_year
end
leap_year = leap_year.to_i + 4
end
On Thu, Mar 28, 2013 at 1:17 PM, Phil H. <lists@ruby-forum.com > <mailto:lists@ruby-forum.com>> wrote:
This one is stumping me because of all the variables needed. Only thing
taught before this challenge was basic branches and loops. This is what
I have so far.
puts 'Leap Year Calculator'
puts ' '
puts 'Enter the starting year.'
starting_year = gets.chomp
puts 'Enter the ending year.'
ending_year = gets.chomp
The rest doesn't work at all because if you put something like 2096-2104
you would print out 2096, 2100 which is incorrect in two ways
1) 2100 isn't a leap year
2) 2104 should be printed and your second while clause precludes that
You shouldn't be worrying about the starting year as much as you are -
you need to handle every leap year in the same fashion
So lets try something like this
leap_year = starting_year + starting_year % 4 #set yourself onto a
possible leap year to start with
leap_year = sy - sy % 4
leap_year = leap_year + 4 unless sy == leap_year
or a single line overly cute option
leap_year = sy - sy % 4 + 4 * (sy % 4 <=> 0) # I can't think of another way
to get the signum function in ruby
John
···
On Thu, Mar 28, 2013 at 3:05 PM, <sto.mar@web.de> wrote:
Am 28.03.2013 21:48, schrieb John W Higgins:
On Thu, Mar 28, 2013 at 1:17 PM, Phil H. <lists@ruby-forum.com >> <mailto:lists@ruby-forum.com>> wrote:
This one is stumping me because of all the variables needed. Only
thing
taught before this challenge was basic branches and loops. This is
what
I have so far.
puts 'Leap Year Calculator'
puts ' '
puts 'Enter the starting year.'
starting_year = gets.chomp
puts 'Enter the ending year.'
ending_year = gets.chomp
The rest doesn't work at all because if you put something like 2096-2104
you would print out 2096, 2100 which is incorrect in two ways
1) 2100 isn't a leap year
2) 2104 should be printed and your second while clause precludes that
You shouldn't be worrying about the starting year as much as you are -
you need to handle every leap year in the same fashion
So lets try something like this
leap_year = starting_year + starting_year % 4 #set yourself onto a
possible leap year to start with
