进行文件基本操作的应用程序。本实例的知识点有：调用C++现成的系统函数库进行文件的各种操作（查找、检查操作权限、重命名、删除）。-Basic operations for file applications. The examples of knowledge points are: calling C++ library for existing file systems of various operations (find, check operation permissions, ren

适应于对各种问卷调查结果进行统计使用，除了导出统计结果外还保留每一张问卷调查表的结果，以便返回检查或修改；还可对每一次问卷调查对应的文档进行密码保护，可以设置打开权限密码和修改权限密码两级密码保护。 -Adapted to also keep every one of the results of the questionnaire, in addition to the export statistics on a variety of survey results were statis