设计模式中单件类的例子，用VC++开发，有源码和可执行程序，直接编译运行。是根据李建忠的设计模式讲义编写的例子，对初学设计模式的人很有帮助。-Design Patterns in a single category of examples, using VC++ development, there is source code and executable programs, run the compiler directly. LI Jian-zhong design is based on

本书介绍如何以面向对象的方式来编程，以及如何用设计模式来解决面向对象系统中的常见问题(This book describes how to program in an object-oriented manner and how to use design patterns to solve common problems in object-oriented systems)