国嵌源码
#!/bin/sh
echo "Hit a key ,then hit return."
read Keypress
case "Keypress" in
[A-Z] ) echo "uppercase letter";;
[a-z] ) echo "lowercase letter";;
[0-9] ) echo "Digit";;
* ) echo "Punctuation ,whitespace,or other";;
easc
的运行结果只有a是lowercase letter
其他字母都是uppercase letter
这是为什么？
