在Scratch中将文本转换为大写
在Scratch中将文本转换为大写
提问于 2020-10-20 15:09:30
我的侄女正在试着用scratch做作业，并请求一些帮助。她的任务是创建一个脚本，该脚本接受混合了数字和小写字母的密码，并且她必须将字母从小写更改为大写。我以前从来没有用过划痕..我尽了最大的努力，但我不确定我在哪里犯了错。我将evengroup设置为包含密码的变量。我创建了一个新函数，它基于我在网上找到的东西，并将其合并到左侧密码的迭代中。有什么想法吗？
回答 2
Stack Overflow用户
发布于 2020-10-20 20:30:06
Stack Overflow用户
发布于 2021-08-07 21:50:55
我已经定义了两个自定义块：
位置
将变量position$设置为character在text中的位置。0表示在给定文本中找不到给定字符。我们将使用该块根据小写字母集检查密码的每个字符。
大写
将密码的每个字符传递给position块。如果position$不为0，则当前字符是小写字母，并在大写字母集中查找对应的字符。否则，保留当前字符。uppercase$变量累加这两种检查的结果。
define position [character] [text]
set [position$ v] to []
set [pos_i v] to [0]
repeat until <<(position$) > [0]> or <(pos_i) > (length of (text))>>
if <(letter (pos_i) of (text)) = (character)> then
set [position$ v] to (pos_i)
end
change [pos_i v] by [1]
end
define uppercase [text]
set [uppercase$ v] to []
set [upp_i v] to [1]
repeat (length of (text))
position (letter (upp_i) of (text)) [abcdefghijklmnopqrstuvwxyz]
if <(position$) > [0]> then
set [uppercase$ v] to (join (uppercase$) (letter (position$) of [ABCDEFGHIJKLMNOPQRSTUVWXYZ])
else
set [uppercase$ v] to (join (uppercase$) (letter (upp_i) of (text))
end
change [upp_i v] by [1]
end
when green flag clicked
ask [Enter your password] and wait
uppercase (answer)
say (uppercase$)
如果你想看看这在Scratch3中是什么样子，下面有一个片段：
<script src="https://github.com/scratchblocks/scratchblocks/releases/download/v3.5.2/scratchblocks-v3.5.2-min.js"></script>
<pre class="blocks">
define position [character] [text]
set [position$ v] to []
set [pos_i v] to [0]
repeat until <<(position$) > [0]> or <(pos_i) > (length of (text))>>
if <(letter (pos_i) of (text)) = (character)> then
set [position$ v] to (pos_i)
end
change [pos_i v] by [1]
end
define uppercase [text]
set [uppercase$ v] to []
set [upp_i v] to [1]
repeat (length of (text))
position (letter (upp_i) of (text)) [abcdefghijklmnopqrstuvwxyz]
if <(position$) > [0]> then
set [uppercase$ v] to (join (uppercase$) (letter (position$) of [ABCDEFGHIJKLMNOPQRSTUVWXYZ])
else
set [uppercase$ v] to (join (uppercase$) (letter (upp_i) of (text))
end
change [upp_i v] by [1]
end
when green flag clicked
ask [Enter your password] and wait
uppercase (answer)
say (uppercase$)
</pre>
<script>
scratchblocks.renderMatching('pre.blocks', {style: 'scratch3'});
</script>
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/64440165
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