一条RUBY程序

august

程序是这样的：
# save this as guess.rb
words = ['foobar', 'baz', 'quux']
secret = words[rand(3)]

print "guess? "
while guess = STDIN.gets
  guess.chop!
  if guess == secret
    print "You win!\n"
    break
  else
    print "Sorry, you lose.\n"
  end
  print "guess? "
end
print "The word was ", secret, ".\n"我想问的是“while guess = STDIN.gets”是一个怎样的循环条件。还有就是这程序是怎样运作的？

拉维

最近忙于考试，没时间学习Ruby。
STDIN.gets可能是一个从输入端获取一个字符串，然后赋给guess，而表达式“guess=STDIN.gets”本身有一个值。如果，STDIN获得一个字符串，则guess=STDIN.gets为真，运行循环体。

august

感谢你的回答