摘要：
``` #include typedef enum SessionState { SESSION_OPENING, /* Session scope is being created */ SESSION_ONLINE, /* Logged in */ SESSION_ACTIVE, /* Logged in and in the fg... 阅读全文
摘要：
在编译C语言时有时会遇到这样的错误提示： 'true' undeclared (first use in this function) or `false' undeclared (first use in this function) 就是说 bool, true, false 都是undecla 阅读全文