known define

1. Define (that is, host variable)The main role of the host variable is to act as an alternative variable, a medium in which the host environment can interact with Oracle . When you define a host variable by define, you must specify the variable

There are many places in the C language where macro definitions are used, such as in header files to prevent header files from being repeatedly included: #ifndef ctest_header_h #define CTEST_HEADER_H /header file content #endif Many macro

DataContractSerializer hosts the serialization and deserialization operations of all data contract objects. In the previous article (Data Contract and Data Contract serializers (DataContractSerializer)), we talked about DataContractSerializer basic

Let's look at a few examples (1) struct{int x; int y;} Test1; Well, define the structure test1, test1.x and test1.y can be used in the statement. (2) struct test {int x; int y;} Test1; Well, define the structure test1, test1.x and test1.y can be

: This article mainly introduces the difference between const and define in php (supplement). If you are interested in PHP tutorials, refer to it. A constant is the identifier (name) of a simple value ). As its name implies, this value cannot be

Ext.: http://my.oschina.net/1pei/blog/479162PNG format: Each PNG file is made up of a PNG identifier (signature) followed by some data blocks (chunk), each chunk byA chunk type to identify its functionality.Abstract this article addresses the libpng

Difference between typedef and define   The following code is used to describe Typedef char * typedef_char;# Define define_char char * // No semicolon here Void main (INT argc, char * argv []){Char s [] = "ASDF ";Const typedef_char P = s; // char *

what is a USB flash drive u disk, full name "USB flash drive", English "USB flash disk". It is a USB interface with no physical drive micro high-capacity mobile storage products, can be connected via USB interface to the computer for Plug and play.

Well-known kernel threads in Linux (1) -- ksoftirqd and events Well-known kernel threads in Linux (1) -- ksoftirqd and events-- Lvyilong316 We know that there are many kernel threads created by the linux system, which guarantee the normal operation

PHP uses the Define () function to define a constant. The so-called constant refers to the value of the amount of constant, this article collects a few about the PHP constants of the article, I hope that you understand the PHP constants help, come