void File() {
       CFile file;
       //modeCreate:没有就创建，有直接打开
       //modereadwrite:读写方式打开
       file.Open("E:/a.txt",CFile::modeCreate|CFile::modeReadWrite);
       file.Write("aiyoubucuo", strlen("aiyoubucuo"));
       file.SeekToBegin();
       char buf[256] = { 0 };
       file.Read(buf, 256);
       printf("%s\n", buf);
       file.Close();
}

void Find(CString path) {
       CFileFind find;
       BOOL goFind = find.FindFile(path + "/*.*");
       while (goFind) {
              goFind = find.FindNextFile();
              CString filename = find.GetFileName();
              CString filepath = find.GetFilePath();
                //不能是空目录且不能是. ..目录
              if (find.IsDirectory() && !find.IsDots()) {
                     printf("[%s]\n", filename);
                     Find(filepath);
              }
              else {
                     printf("%s\n", filename);
              }
       }
       find.Close();
}