介绍语法制导翻译和各种语法成分的中间代码的生成；第6章介绍符号表的 组织和使用；第7章介绍运行时存储空间的组织与分配；第8章介-guidance on grammar and translation of various grammatical elements in the middle of the code generation; Chapter 6 on the symbol table of organization and use; Chapter 7 on storage sp

Mifare s50/s70控制位计算，涉及A密码，B密码的权限分配。-Mifare s50/s70 control calculations involving passwords A, B passwords distribution of competences.