Use boost. filesystem for file operations

Because the file system is associated with the operating system, and the APIs on Windows and unix platforms are quite different. Therefore, file operations have always been a headache for c ++ programmers who develop platforms.

Although the <iostream> library of STL provides simple file operations (only for file creation and deletion), it is far from meeting our needs. Therefore, the boost. filesystem Library provides a cross-platform file library to facilitate development by programmers.

Note: boost. filesystem has been incorporated into TR2. Although it has not been formally standardized, It is supported in vc11 and gcc and can be used directly. The corresponding namespace is std: tr2: sys.

IBM has written an article about Boost Filesystem Library, so I will not discuss it here. For detailed descriptions of each function, see the msdn document.