\((.+)\)

or

^\((.+)\)$

or

^\((\w+)\)$

Note: If the processing content changes, regularization should also be modified.

C language, don't write, because there is no normalization processing efficiency.

If you are interested, you can go and see:

Learning experience of crifan regular expression

I don't want to post the address here. Please Google the title yourself and you will find the post address. )