该程序用是Linux系统下，用c语言实现的，用于计算文件的大小。这个接口设计的非常好用，直接调用，只需要传入文件的（路径）名，就可以返回文件的大小。-The program uses the Linux system, using c language, used to calculate the file size. The interface design is very easy to use, direct calls, only incoming file (path) name, you can return the file size.