多线程程序的编写，多线程应用中容易出现的问题。互斥对象的讲解，如何使用互斥对象来实现多线程的同步。如何利用命名互斥对象保证应用程序只有一个实例运行。应用多线程编写网络聊天室程序。-Lesson Of Severl Work

表达式求值，先输入需要计算表达式的个数，再逐个写出表达式-Program design require for a function, can complete randomly input an expression (including parentheses, digital, arithmetic symbol), and be able to according to your input expression to evaluated, and come to the corre

severl operations related to the wavelet compression are described here,watermarking is also shown