几个小汇编程序，汉字库，模块化编程实例等-Several small assembler, Chinese Character, modular programming examples, etc.

单例模式确保某个类只有一个实例，而且自行实例化并向整个系统提供这个实例。(Singleton patterns ensure that a class has only one instance, and instantiate itself and provide the whole system with this instance.)