mifi definition

Macro Definition #define APLLCON0 * (volatile unsigned int *) 0xff500100), value is virtual address question : GDB tracing Debug When you want to view the value of this macro, you are prompted as follows: No symbol "APLLCON0" in the current context. Analysis : Reference http://blog.csdn.net/jibing57/article/details/7439631 The compiler does not compile the macro definition extension information into

Macro definition that contains if When the macro definition contains an IF 1) define the following macros#define DC (P) if (foo (p)) fun (p) Used in the following environment if (k>n) DC (k); Else DC (n); After the macro is replaced, the following if (k>n) if (foo (k)) Fun (k); Else if (foo (n)) Fun (n); Visible, the original if and else are no longer paired. 2 To avoid such problems, we can define a ma

We usually need to according to customer demand for the results of the query to provide customers with their own definition of the sort, then we usually need to implement the SQL is what, many other information summarized such as the following (not good and wrong to point out):first, let's say that we just need to sort the application in a particular program in the following way, we just have to set the sort at the SQL statement level: 1, in accordanc

We use Activiti (5.14 version) as the process engine, and today we find a problem in the product, the approval record of a process,The activity name recorded in the Activity instance table (Act_name of the Act_hi_actinst table) is the name of the activity that does not exist in the process.Confirmed that the process has not been modified.Later discovered is the problem of Activiti cache, our products are supported by multi-company use, each company uses a different database,Therefore, the proces

This article mainly describes the HTML5 menu label definition and usage examples, there are instances and examples of results in, which makes us more simple to learn, so please read this article about HTML5 menu tags HTML5 the definition and usage of the menu tag: HTML5 A toolbar with two menu buttons ("File" and "Edit"), each containing a drop-down list with a series of options: Two ways to use the m

node nodes are considered to be ordered from left to right, it is called ordered tree; otherwise, it is called an unordered tree. The fraternal nodes of the ordered tree cannot be exchanged.(9) Forest: A collection of trees is called a forest. There is a close relationship between trees and forests. Deletes the root node of a tree, and all its original subtrees are trees, constituting the forest. The root node of all the trees connected to the forest with one node is the tree. This node is call

Tags: mysql DDL creationFirst, the specific installation of MySQL here is not much to say, there are many online. You can find it on the Internet, there are installed version and compressed version.Second, verify that the database is installed successfully:Under DOS command line enter: Mysql-u root-p (the default is the direct return on it, if you do not set the password)If you set a password, you have to enter the password.Will log on to MySQL, there is a message for MySQL. Third,DDL: Data

the relationship between objects, can be recognized from the following file. 1 item.h: The Total object definition class, which defines the ' item ' class as the Total object class, since then, many subclasses are defined in this file to enrich and develop the objects that MySQL can handle. However, this class inherits from the ' Parse_tree_node ' class, which makes the object and lexical parsing associated, which is not a detailed explanation. 2 ite

Definition, deletion and modification of basic tables for data definitionDefinedFormat: CREATE table Example 1:CREATE TABLE Student (ID INT (one) PRIMARY KEY,NAME VARCHAR (one) UNIQUE);Example 2:CREATE TABLE Student (ID INT (11),NAME VARCHAR (11),PRIMARY KEY (ID),Poreign KEY (name) REFERENCES NAMES (name));ModifyFormat: ALTER TABLE[Add [Column] [Add [table-level integrity constraint]][Drop[column] [Drop constraint [Alter COLUMN Example 1 adding a colu

[PHP] Conditional compilation definition in PHP source code, php source code The mechanism for Compiling different codes and generating different target files according to different situations is called Conditional compilation.The following pre-processing commands are available: # if, # elif, # else # endif; # ifdef # else # endif PHP source code: # Ifdef SERIALIZE_HEADERS // if there is a macro definition