在学习Visual C++编程的时候，会建立一个又一个的工程，这么多的工程，除了管理上的问题之外，就是要占用大量的磁盘空间，而实际有用的东西并不大。如果VC工程较长的时间不用，而又必须保留，那么清除其中无用的东西就势在必行。在VC工程中，我们可以把工程目录下面的*.ncb、*.opt、*.plg文件删除是不会影响工程的完整性，另外还有比较大的就是debug和release两个文件夹，也可以删除-In studying Visual C++ Programming, we will set up one after another of the works, so many projects, in addition to management issues, is to use up a lot of disk space, but the actual useful things is not too great. If the VC do not work a longer period of time, and must be preserved, then the removal of useless things in which it is imperative. In the VC project, we can project the following directory*. ncb,*. opt,*. plg files are deleted will not affect the integrity of the project, there is another that is relatively large both debug and release folder, and also can delete