一个分割合并文件的程序，分割程序和合并程序可单独运行，前者实现把大的文件分割成多个便于携带的小文件，后者可实现把这些小的文件重新合并，恢复原来的文件。-A division of the merger documents, segmentation procedures and the merger process can be run separately, the former to achieve the large files are split into multiple small