開発環境
- OS X Lion - Apple(OS)
- Emacs、BBEdit - Bare Bones Software, Inc. (Text Editor)
- Ruby (プログラミング言語)
『初めてのプログラミング 第2版』(Chris Pine 著、長尾 高弘 訳、オライリー・ジャパン、2010年、ISBN978-4-87311-469-9)の 10章(章全部で復習), 10.5(練習問題続き)、「壁にビールが99本」、を解いてみる。
その他参考書籍
- 『プログラミング言語 Ruby』David Flanagan, まつもと ゆきひろ 著 、卜部 昌平 監訳、長尾 高弘 訳、オライリー・ジャパン、2009年、ISBN978-4-87311-394-4)
- Rubyクックブック ―エキスパートのための応用レシピ集
「壁にビールが99本」
コード(BBEdit)
sample.rb
#!/usr/bin/env ruby2.0
#-*- coding: utf-8 -*-
def english_number number
return '負ではない数値を入力してください' if number < 0
return 'zero' if number == 0
num_string = ''
ones_place = %w[one two three four five
six seven eight nine]
tens_place = %w[ten twenty thirty forty fifty
sixty seventy eighty ninety]
teenagers = %w[eleven twelve thirteen fourteen fifteen
sixteen seventeen eighteen nineteen]
others = [
[2, 'hundred'],
[3, 'thousand'],
[6, 'million'],
[9, 'billion'],
[12, 'trillion'],
[15, 'quandrillion'],
[18, 'quintillion'],
[21, 'sextillion'],
[24, 'septillion']]
left = number
while others.length > 0
other = others.pop
n = other[0]
name = other[1]
d = 10 ** n
write = left / d
left -= write * d
if write > 0
pre = english_number write
num_string = num_string + pre + ' ' + name
num_string += ' ' if left > 0
end
end
write = left / 10
left -= write * 10
if write > 0
if write == 1 and left > 0
num_string += teenagers[left - 1]
left = 0
else
num_string += tens_place[write - 1]
end
if left > 0
num_string += '-'
end
end
write = left
left = 0
num_string += ones_place[write - 1] if write > 0
num_string
end
n = 10000
while n > 3
n -= 1
next if n < 9990
puts "#{english_number n} bottles of beer on the wall, " +
"#{english_number n} bottles of beer!"
puts "Take one down, pass it around, #{english_number n} " +
"bottles of beer on the wall!"
puts "*" * 100 if n == 9990
end
puts "#{english_number 2} bottles of beer on the wall, " +
"#{english_number 2} bottles of beer!"
puts "Take one down, pass it around, #{english_number 1} " +
"bottle of beer on the wall"
puts "#{english_number 1} bottle of beer on the wall, " +
"#{english_number 1} bottle of beer!"
puts "Take one down, pass it around, no more bottles of beer on the wall!"
入出力結果(Terminal)
$ ./sample.rb nine thousand nine hundred ninety-nine bottles of beer on the wall, nine thousand nine hundred ninety-nine bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-nine bottles of beer on the wall! nine thousand nine hundred ninety-eight bottles of beer on the wall, nine thousand nine hundred ninety-eight bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-eight bottles of beer on the wall! nine thousand nine hundred ninety-seven bottles of beer on the wall, nine thousand nine hundred ninety-seven bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-seven bottles of beer on the wall! nine thousand nine hundred ninety-six bottles of beer on the wall, nine thousand nine hundred ninety-six bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-six bottles of beer on the wall! nine thousand nine hundred ninety-five bottles of beer on the wall, nine thousand nine hundred ninety-five bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-five bottles of beer on the wall! nine thousand nine hundred ninety-four bottles of beer on the wall, nine thousand nine hundred ninety-four bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-four bottles of beer on the wall! nine thousand nine hundred ninety-three bottles of beer on the wall, nine thousand nine hundred ninety-three bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-three bottles of beer on the wall! nine thousand nine hundred ninety-two bottles of beer on the wall, nine thousand nine hundred ninety-two bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-two bottles of beer on the wall! nine thousand nine hundred ninety-one bottles of beer on the wall, nine thousand nine hundred ninety-one bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-one bottles of beer on the wall! nine thousand nine hundred ninety bottles of beer on the wall, nine thousand nine hundred ninety bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety bottles of beer on the wall! **************************************************************************************************** two bottles of beer on the wall, two bottles of beer! Take one down, pass it around, one bottle of beer on the wall one bottle of beer on the wall, one bottle of beer! Take one down, pass it around, no more bottles of beer on the wall! $
ちなみにpython3.4の場合。
コード(BBEdit)
sample.py
#!/usr/bin/env python
#-*- coding: utf-8 -*-
def englishNumber(num):
if num < 0:
return "負でない数値を入力してください"
if num == 0:
return 'zero'
num_string = ''
ones_place = ["one", "two", "three", "four", "five", "six", "seven",
"eight", "nine"]
tens_place = ["ten", "twenty", "thirty", "forty", "fifty", "sixty",
"seventy", "eighty", "ninety"]
teenagers = ["eleven", "twelve", "thirteen", "fourteen", "fifteen",
"sixteen", "seventeen", "eighteen", "nineteen"]
others = [
[2, 'hundred'],
[3, 'thousand'],
[6, 'million'],
[9, 'billion'],
[12, 'trillion'],
[15, 'quandrillion'],
[18, 'quintillion'],
[21, 'sextillion'],
[24, 'septillion']]
left = num
while len(others) > 0:
other = others.pop()
n = other[0]
name = other[1]
d = 10 ** n
write = left // d
left -= write * d
if write > 0:
pre = englishNumber(write)
num_string = num_string + pre + ' ' + name
if left > 0:
num_string += ' '
write = left // 10
left -= write * 10
if write > 0:
if write == 1 and left > 0:
num_string += teenagers[left - 1]
left = 0
else:
num_string += tens_place[write - 1]
if left > 0:
num_string += '-'
write = left
left = 0
if write > 0:
num_string += ones_place[write - 1]
return num_string
n = 9999
for i in range(n, 2, -1):
if i < 9990:
continue
print("{0} bottles of beer on the wall, {0} bottles of beer!".format(
englishNumber(i)))
i -= 1
print("Take one down, pass it around, " + englishNumber(i) +
" bottles of beer on the wall!")
if i == 9990:
print('*' * 100)
print("{0} bottles of beer on the wall, {0} bottles of beer!".format(
englishNumber(2)))
print("Take one down, pass it around, {0} bottle of beer on the wall".format(
englishNumber(1)))
print("{0} bottle of beer on the wall, 1 bottle of beer!".format(
englishNumber(1)))
print("Take one down, pass it around, no more bottles of beer on the wall!")
入出力結果(Terminal)
$ ./sample.py nine thousand nine hundred ninety-nine bottles of beer on the wall, nine thousand nine hundred ninety-nine bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-eight bottles of beer on the wall! nine thousand nine hundred ninety-eight bottles of beer on the wall, nine thousand nine hundred ninety-eight bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-seven bottles of beer on the wall! nine thousand nine hundred ninety-seven bottles of beer on the wall, nine thousand nine hundred ninety-seven bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-six bottles of beer on the wall! nine thousand nine hundred ninety-six bottles of beer on the wall, nine thousand nine hundred ninety-six bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-five bottles of beer on the wall! nine thousand nine hundred ninety-five bottles of beer on the wall, nine thousand nine hundred ninety-five bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-four bottles of beer on the wall! nine thousand nine hundred ninety-four bottles of beer on the wall, nine thousand nine hundred ninety-four bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-three bottles of beer on the wall! nine thousand nine hundred ninety-three bottles of beer on the wall, nine thousand nine hundred ninety-three bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-two bottles of beer on the wall! nine thousand nine hundred ninety-two bottles of beer on the wall, nine thousand nine hundred ninety-two bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety-one bottles of beer on the wall! nine thousand nine hundred ninety-one bottles of beer on the wall, nine thousand nine hundred ninety-one bottles of beer! Take one down, pass it around, nine thousand nine hundred ninety bottles of beer on the wall! **************************************************************************************************** nine thousand nine hundred ninety bottles of beer on the wall, nine thousand nine hundred ninety bottles of beer! Take one down, pass it around, nine thousand nine hundred eighty-nine bottles of beer on the wall! two bottles of beer on the wall, two bottles of beer! Take one down, pass it around, one bottle of beer on the wall one bottle of beer on the wall, 1 bottle of beer! Take one down, pass it around, no more bottles of beer on the wall! $
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