Introduction - If you have any usage issues, please Google them yourself
String from left to right scan source, according to lexical rules (regular grammar rules) to identify all the right words, and converted into the corresponding binary word type (species ID, attribute value) to the use of grammatical analysis . This program provides an output representative of keywords KeyWord, Word on behalf of ordinary identifiers, Digit behalf of the Arab figures, SingleWord behalf of a single delimiter, DoubleWord behalf double delimiter, ERROR behalf of unrecognized characters.