一个实例程序,能对任意一个文件进行加密,密码要求用户输入,限8位以内(当然你可以再更改).程序有很好的容错设计,这是我们应该学习的.-a sample program, capable of an arbitrary file encryption, password request user input limit within eight (of course you can change). Procedures have a good fault-tolerant design, that is what we should learn.