摘要: 说明: 分析的语言是SNL语言,详见《编译程序的设计与实现》( 刘磊、金英、张晶、张荷花、单郸编著) 词法分析就是实现了词法分析的自动机 语法分析使用递归下降法 运行结果: 词法分析 得到TokenList 语法分析 输出语法树 运行输出: 代码: main.cpp cs1.txt END 代码写于 阅读全文
posted @ 2016-07-13 11:35 maxuewei2 阅读(3191) 评论(0) 推荐(1) 编辑
摘要: 功能: 登录 若用户账号不存在,弹出错误 若用户密码错误,弹出错误 若用户账号已在线,弹出错误 注册 若用户已注册,弹出错误 聊天室 多人聊天,类似QQ里的群。 点击右侧的在线用户,可进行一对一聊天。 一对一聊天 在聊天室中点击在线用户可进入此窗口。 发送消息后,对方会收到消息,并弹出一对一聊天窗口 阅读全文
posted @ 2016-07-13 10:59 maxuewei2 阅读(3400) 评论(2) 推荐(0) 编辑
这是一段经过10次base64加密的密文: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