从某一字符串中搜寻是否有字符A，若有，则吧搜索次数记下来，送到BX寄存器中，若没有查到，则将BX清零
Search a string if a character is A, and if so, the number of searches it down, to the BX register, if not found, it will be cleared BX (2016-06-11, DOS, 8KB, 下载1次)
利用批处理程序写的代码,调用浏览器使用相应搜索引擎进行搜索
Use a batch process to write the code, call the browser using the appropriate search engine search (2016-02-29, DOS, 1KB, 下载3次)