Codecery :: Exercise 002

Exercise-002.rb

##### Adds
puts "Adds n + (n-x)."
#print "Input an integer number: "
#n = gets
n = 5

(n).downto(0) do |a|
	x = n-a
	break if a < x
	puts "#{a} + #{x} = #{a+x}"
end
puts ''




##### Get Cube for n.
def getOdd(n)
	x = []
	(n).times { |a| x << a if a%2 != 0 }
	x
end
def getStart(n)
	x = 0
	(0..n-1).each { |z| x += z }
	x * 2 + 1 
end

puts "Get Cube for n."
#print "Input an integer number: "
#n = gets
n = 4

n_i = getOdd(200)



(1..10).each do |x|
	n = x
	puts "Number: #{n}"
	m = getStart(n)
	s = 0
	n2 = n
	puts "#{n} * 3 = #{m}"

	n_i.each do |a|
		if a >= m then
			n2 -= 1
			s = s + a
			print a
			if n2 == 0 then
				break 
			else
				print " + "
			end
		end
	end
	print " = #{s}\n\r"
	puts "Test: #{n**3} ?== #{s}"
	puts ''
end