说明：  针对程序中关键字出现频度,设计并实现了智能扫描源程序,利用Hash和二分两种查找方法进行搜索并统计关键字的出现频度,并对两种方法的查找的优缺点作了比较和归纳。
(Keyword for the frequency of occurrence in the program design and implementation of intelligent scanning source code, the use of Hash and two are two ways to search and find statistical keyword frequency of occurrence, and the advantages and disadvantages of both methods were compared to find and summarized.)