摘要: 学习linux期间,看到一个语句 pid_t pid = fork(); 想要理解pid_t 与 fork() 的意义为何。 pid_t是一个数据类型,定义的类型是进程号id,fork()函数则返回一个id号 pid_t需要头文件 <sys/types.h> 支持 分析一波 运行结果如下图 运行发现 阅读全文
posted @ 2020-12-12 22:33 DDone 阅读(1413) 评论(0) 推荐(0)
摘要: 麦德乐点餐系统sysML ————需求图: 点餐系统包含三个系统块以及相应的系统功能 ————用例图: 通过一系列特定的动作后,能够向点餐用户提供服务,也可以方便管理员进行管理 ————模块定义图: 展示模型功能模块之间的关系 ————行为图: ————内部模块图: 阅读全文
posted @ 2020-11-30 10:33 DDone 阅读(80) 评论(0) 推荐(0)
摘要: Organization Chart The Organization Chart pattern creates elements and a diagram that model the roles, responsibilities and reporting lines for an org 阅读全文
posted @ 2020-11-16 13:09 DDone 阅读(72) 评论(0) 推荐(0)
摘要: Starter State Machine The Starter State Machine Pattern describes an entity (e.g. Class, Actor, Use Case or Test Case) from the point of view of the i 阅读全文
posted @ 2020-11-07 21:22 DDone 阅读(88) 评论(0) 推荐(0)
摘要: Starter State Machine The Starter State Machine Pattern describes an entity (e.g. Class, Actor, Use Case or Test Case) from the point of view of the i 阅读全文
posted @ 2020-10-30 21:10 DDone 阅读(77) 评论(0) 推荐(0)
摘要: 链接: 1、麦当劳点餐系统:https://www.4008-517-517.cn/cn/ 2、肯德基点餐系统: https://www.4008823823.com.cn/kfcios/Html/index.html?utm_campaign=KFC_Online_Ordering&utm_sou 阅读全文
posted @ 2020-10-26 09:00 DDone 阅读(159) 评论(0) 推荐(0)
摘要: 图档绘制目录 1.Composite State with History 2.Nested States 3.Complete State Machine 4.One Class Executable State Machine Composite State with History 历史复合状 阅读全文
posted @ 2020-10-18 21:08 DDone 阅读(103) 评论(0) 推荐(0)
摘要: Composite State with History The Composite State with History Pattern describes an entity (e.g. Class, Actor, Use Case or Test Case) from the point of 阅读全文
posted @ 2020-10-18 19:56 DDone 阅读(142) 评论(0) 推荐(0)