Introduction - If you have any usage issues, please Google them yourself
(1) the preparation of an intermediate code generation process, can the arithmetic expression (such as with nested parentheses), etc. translated into quad. (2) The program has the versatility that can accept a variety of arithmetic expressions and other grammatical elements. (3) the running instance. For the syntactically correct arithmetic expression can produce four-sequence, and output results on the incorrect expression, can detect errors. (4) to the internship report