Ruby入門

#GoodBye,Worldプログラム

print ""

# Hello,Worldプログラム２

hello="Hello,World\n"
print hello
print "hello\n"
print 'hello\n'

x = [1,3,5]		# 配列の作成
y = ["good morning", "hello", "good bye"]

p x[0]			# 配列要素の表示
p y[2]

array=[1,2,3]
for i in array
 print i,"\n"
end

array=[1,2,3]
array.each do |i|
 print i,"\n"
end

while line=gets
	if line =~ "skip"	# skipの行は処理しない
		next
	end
	if line =~ "quit"	# quitがあれば処理終了
		break
	end
	print line, "\n"	#1行ずつ表示
end

a=123
b=124
c=123
a == b and print "a==b\n"
a == c and print "a==c\n"

a=123
b=124
c=123
print "a==b\n" if a == b
print "a==c\n" if a == c

# 制御構造の変数

a = [1,2,3]
i = 100
for i in a
end
print i

# ブロック引数

a = [1,2,3]
i = 100
a.each do |i|
end
print i

a = 100
def method(a)
 a = 200
end
method(a)
print a

a = [100]
def method(a)
 a[0] = 200
end
method(a)
print a

a = [1, 2, 3]
b = a
b[0] = 100
p a

a = [1, 2, 3]
b = a.clone
b[0] = 100
p a

 price=30000
 count=0

 print "おやじ\n",
       "「へいらっしゃいッ！」\n",
       "「安いよ、安いよ！」\n",
       "「バナナ一本がたったの", price, "円だッ！」\n"
 print "「あんた、いくら持ってんだい？」\n"
 money=gets.to_i
 print money, "円です。\n"

 if money<price
   print "おやじ\n",
         "「けぇった、けぇったぁ！」\n",
         "「あんたに売るバナナはうちにゃねぇよッ！」\n"
   exit
 end

 while count<5
   # 選択
   print "【買う】->1、【値切る】->0\n"
   res=gets.to_i

   if res==1
	 break
   end

   # 値引き
   money=money/2
   price=price-money

   # おやじの思考
   if price<=0
	break
   end

   case	count
   when 0
       print "おやじ\n",
             "「よーし、わかった！これならどうだ！", price, "円だ！」\n"
   when 1
       print "おやじ\n",
             "「これならどうだ！", price, "円だ！」\n"
   when 2
       print "おやじ\n",
             "「これ以上はまけられねぇよ。」\n",
             "「", price, "円だ！」\n"
   when 3
       print "おやじ\n",
             "「ほんまにこれ以上は無理だぜよ！」\n",
             "「", price, "円でどうだ！」\n"
   when 4
       print "おやじ\n",
             "「あんたの根性、気に入った！」\n",
             "「持ってけどろぼーッ！ただだ！ただ！金なんかいらねぇやッ！」\n"
   end
   count+=1
end

 # 最後のセリフ
 if res==1
   print "おやじ\n「バナナ一本", price, "円！」\n「まいど！」\n"
 elsif count==5
   print "おやじ\n「まいど！」\n"
 else
   print "おやじ\n「金持ってるくせにケチるんじゃねぇよ。」\n"
 end