Introduction - If you have any usage issues, please Google them yourself
This is an experiment in compiling principles, which converts a regular expression into an algorithm that does not determine a poor automaton NFA, and friends who are interested can download it.
A regular expression is a literal pattern composed of common characters (such as character a to z) and special characters (called metacharacters). This pattern describes one or more strings that match when looking for a text body. The regular expression is used as a template to match a character pattern to the searched string.
The symbol of this example includes:
1. Basic regular expressions, such as ab
2. Repeat, such as a*
3. Choose between various options, such as a BBB 0 b
In the Reg Exp of Convert, click enter the regular expression, then click Convert-> To the NFA.