Macro: Usually put some commonly used strings, basically leave the definition macro1. Compile time is different: const is compiled at the time of compilation, the macro is compiled at the time of compilation (pre-compilation is the program load, Xcode will have a progress bar, show progress, this time is actually in pre-compilation)2. Compile detection: const has compile detection, and macro does not compile detection3. Benefits of Macros: You can def
From: http://blog.21ic.com/user1/349/archives/2008/48018.html
It is recommended to write C language. A beautiful macro definition is very important. Using a macro definition can prevent errors, improve portability, readability, and convenience. The following lists some mature software commonly used macro definitions ......
1. prevent a header file from being repeatedly contained
# Ifndef comdef_h
#
In the previous article, we talked about how to introduce the maste page in site definition. This is a necessary step, but it is definitely not enough, because it is impossible for us to deploy and use the master page without designing it. The appearance design must involve the introduction and use of CSS and other resources. Here we will continue with the above operations. In this article, we will look at how to introduce our CSS resources (of course
The definition constants of constants are case-sensitive by default, if define (' AA ', 20,true) denotes case-insensitive, the output name is generally capitalizedBOOLDefine( string $name , Mixed $value [, BOOL $case_insensitive = False ]) ? The constant name must be caused by ' or ' because he is a string type Constants must be declared and judged using the "" ' output when the constant name can be used directlyThe value of a constant cannot be mo
; Full segment definition; Simplified FORMAT
;-------------Stack segment---------------------. MODEL SMALL
Name1 SEGMENT. STACK 64
DB "DUP" (?)
Name1 ENDS
;----------------data segment-----------;---------------------------------------
Name2 SEGMENT. DATA
;d ATA definition is placed here;d ATA definition is placed here
Name2 ENDS;--------------------------------
In the previous article, we roughly analyzed the structure and content of a list definition. A key file is schema. XML. We can see that this file is complex. When using the vs2010 template, vs2010 automatically creates this file for us. Sometimes, we may need to manually create or modify the schema. XML. Is there a way to make this job easier and faster? Two methods are described here:1. Use list templateFirst, manually create the list you want on you
Data Structure linked list _ Interface Definition of two-way linked list, data structure Interface DefinitionIntroduction to two-way linked list
Each element in a two-way linked list is composed of three parts: In addition to data members and next pointers, each element also contains a pointer pointing to its precursor element, called the prev pointer. The structure of a two-way linked list is as follows: link some elements together so that the next p
Interface Definition in Java 8 and Java 8 Interface Definition
Define an interface. If there is a class to implement this interface, you must implement the methods defined in this interface; if the interface has been written, the class is also written, but if the interface is modified again, a method is added, before Java 8, you must change the interface implementation class. There are two ways to change t
C ++ Class Definition 1, Definition 1
Recently, I was so busy that I had to watch a shop in the store, and my friends had a wedding banquet. I 've been so tired over the past few days.
After reading the book in the afternoon, I saw the class and practiced it myself.
Note: 1. the class is a data type/its child change is an object
Format:
Class Name
{
Public: // public... member private: // private... member}
import Java.util.Scanner; // the scanner method of introducing Java's Util library (which can be used as a function) Public class string_if{// define class name string_ifpublicstaticvoid main (string[] agrs) { // defining the main function
The class name defined must match the file name
The defined class name and file name must be capitalized
Import into the library function as well
Definition of the Java_ class-
English from: Java In a nutshell, 6th Edition
Definition of a Lambda ExpressionA lambda expression is essentially a function of does not having a name, and can beTreated as a value in the language. As Java does not allow code to run around in itsOwn outside of classes, in Java, this means, a lambda was an anonymous methodThat's defined on some class (that's possibly unknown to the developer).-java In a nutshell, 6th Edition
In fact, a regular
Php defines arrays and usage examples (php array definition method ). This is an example of php on the array. it briefly describes the basic use of the array. in the example, a comment is added to copy the code as follows :? Php defines a string array $ fruit. this is an example of the php array. it briefly describes the basic use of the array, and adds a comment in the example.
The code is as follows:
// Define a string array$ Fruit = array
circuit.
-15v ~ 0 V = binary 1, 0 ~ + 15 V = binary 0(2) low transmission rate. During asynchronous transmission, the baud rate is 20 kbps;(3) The interface uses a signal line and a signal return line to form a co-location transmission mode. This co-location transmission is prone to common-mode interference, so the anti-noise capability is weak.(4) The transmission distance is limited. The maximum transmission distance is 50 feet. In fact, it can only be used about 50 meters.
Pin
"); Programing in C was fun printf ("Programming" "in C" "is fun" \ n);//programing in C is fun///////////////////////////// Macro definition hasno parameter macro definitionAndwith parameter macro definitionTwo kinds.The general form of a macro definition without parameters is # define identifier character sequence The identifier after # define is called the macro
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