说明：  程序设计语言概论实习题，用prolog语言实现的八皇后以及一个基于定义字句文法的题目，含详细文档，其中prolog的八皇后程序经过优化，快于任何之前网上的各种版本
(Introduction to practical programming language title, the prolog language to achieve the eight Queen' s as well as a definition of words on the subject of grammar, with detailed documentation, including the eight Queen' s prolog program is optimized to the Internet faster than any of the various versions before)