io - io.write 每次都打印同样的东西？

Question

我对 lua 和一般编程非常陌生，目前正在制作一个基本程序来熟悉 if/else/elseif 和 i/o。

基本上，它会询问您是男孩还是女孩，然后相应地打印您的身份。

虽然，我每次运行程序时都会遇到一个问题，它总是会打印出你是个男孩。

对不起，如果我是一个白痴，任何帮助表示赞赏！

代码如下；

io.write("Hello, are you a boy or a girl?\n")
answer = io.read()
if answer == "boy" or "Boy" then
io.write("Oh, so you're a boy, huh?")
elseif answer == "girl" or "Girl" then
io.write("Oh, so you're a girl, huh?")
else
io.write("Wow, i've never heard of an "..answer.." before!\n")
end

Answer 1

尝试

io.write("Hello, are you a boy or a girl?\n")

answer = io.read()

if answer == "boy" or answer == "Boy" then
  io.write("Oh, so you're a boy, huh?")
elseif answer == "girl" or answer == "Girl" then
  io.write("Oh, so you're a girl, huh?")
else
  io.write("Wow, i've never heard of an "..answer.." before!\n")
end

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解释

文档说：

如果此值不同于 nil 和 false，则析取运算符或返回其第一个参数；否则，或返回其第二个参数。

如果 answer == "girl" 的步骤：

1. answer == "boy" or "Boy"
2. false or "Boy"
3. "Boy"
4. 字符串被视为 true -> 执行 if

Answer 2

尝试替换这个：

if answer == "boy" or "Boy" then

有了这个：

if answer == "boy" or answer == "Boy" then

其他情况类似。