如何在bash结尾处使用不带参数的getopts选项

I want to use getopts in bash. The user should select his own options. most of the options gets arguments but there are 2 options that does not gets an argument. It works good when the option without the argument is at the middle of the command, but when it is at the end it does not work.I want to use getopts in bash. The user should