PAGE 55 7.5 A Few Things to Try

1. 99 Bottles of Beer on the Wall...

bottles = 99
while bottles != 0
puts bottles.to_s + ' bottles of beer on the wall'
puts bottles.to_s + ' bottles of beer'
bottles = bottles - 1
puts 'take one down, pass it around'

if bottles == 1
puts bottles.to_s + ' bottle of beer on the wall'
else
puts bottles.to_s + ' bottles of beer on the wall'
end

puts ''

if bottles == 1
puts bottles.to_s + ' bottle of beer on the wall'
puts bottles.to_s + ' bottle of beer'
bottles = bottles - 1
puts 'take one down, pass it around'
puts bottles.to_s + ' bottles of beer on the wall'
end

end

2. A Deaf Grandma program.

say = 'hi grammy'
while say != 'BYE'
say = gets.chomp
while say != say.upcase
puts 'HUH? SPEAK UP SONNY!'
say = gets.chomp
end
year = rand(21) + 1930
puts 'NO, NOT SINCE ' + year.to_s
end

3. Extend your Deaf Grandma program.

say1 = ''
say2 = ''
say3 = ''

while say1 != 'BYE' || say2 != 'BYE' || say3 != 'BYE'


while say1 != 'BYE'

say1 = gets.chomp

if say1 == say1.upcase
year1 = rand(22) + 1929
puts 'NO, NOT SINCE ' + year1.to_s
else
puts 'HUH?! SPEAK UP, SONNY!'
end

if say1 != 'BYE'
say2 = ''
say3 = ''
end
end

while say2 != 'BYE'

say2 = gets.chomp

if say2 == say2.upcase
year2 = rand(22) + 1929
puts 'NO, NOT SINCE ' + year2.to_s
else
puts 'HUH?! SPEAK UP, SONNY!'
end

if say2 != 'BYE'
say1 = ''
say3 = ''
end

end

while say3 != 'BYE'

say3 = gets.chomp

if say3 == say3.upcase
year3 = rand(22) + 1929
puts 'NO, NOT SINCE ' + year3.to_s
else
puts 'HUH?! SPEAK UP, SONNY!'
end

if say3 != 'BYE'
say1 = ''
say2 = ''
end
end

end

4. Leap Years.

puts 'Input a starting year:'
start_year = gets.chomp
puts 'Input an ending year:'
end_year = gets.chomp
puts ''

while start_year.to_i <= end_year.to_i

if start_year.to_f%400 == 0
puts start_year
elsif start_year.to_f%100 == 0
elsif start_year.to_f%4 == 0
puts start_year
end

start_year = start_year.to_i + 1

end