应该是去掉“”就可以了。它只是给出了一个输入栏,我试了一下按照你的脚本的话输不输入都一样,大小写也都一样。如果要大写必须加入U参数,而要必须输入则要加!参数。
It should be that removing "" will be okay. It just gives an input field. I tried it, and it's the same whether I input or not, and the case is the same. If you want uppercase, you must add the U parameter, and if you must input, you need to add the! parameter.