define defragment

The first step, the "attachment" found in the Start menu, click "Disk Defragmenter" selected by System Tools, and you can open it. In the second step, in Disk Defragmenter, we select "C" and click "Analyze Disk". The third step, wait

1. Use the shortcut key "Win+r" and then open the window of the "Run" command, then write "regedit" in the Run bar and click OK to open the Registry Editor for the next step. 2, in the Open new Registry Editor column, and then sequentially

1, first we click on the beginning of the Computer menu, in the lower left-hand corner of the icon click can be seen, and then see all the program this display, we click to select the attachment options inside, in the open System tools, but switched

A constant is an identifier (first name) of a simple value. As the name implies, the value cannot be changed during script execution (except for the so-called magic constants, they are not constants). Changshime is considered to be case sensitive. Usually, constant identifiers are always uppercase. You can use the Define () function to define constants. After PHP 5.3.0, you can use the Const keyword to

#ifndef#define#endif的用法#ifndef#define#endif的用法  你所遇到的这几个宏是为了进行条件编译。一般情况下，源程序中所有的行都参加编译。但是有时希望对其中一部分内容只在满足一定条件才进行编译，也就是对一部分内容指定编译的条件，这就是“条件编译”。有时，希望当满足某条件时对一组语句进行编译，而当条件不满足时则编译另一组语句。     条件编译命令最常见的形式为：     #ifdef 标识符     程序段1     #else     程序段2     #endif         它的作用是：当标识符已经被定义过(一般是用#define命令定义)，则对程序段1进行编译，否则编译程序段2。     其中#else部分也可以没有，即：     #ifdef     程序段1     #

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 * const* P = 'B'; // The P pointer is a constant pointer. It cannot point to anything else, but the content to which it points can be changed. Cout Const define_c

1) #define是预处理指令, in the compilation preprocessing simple substitution, does not make the correctness check, does not have the meaning whether correctly still to carry in, only has in the compilation has been expanded the source program only then discovers the possible error and errors. Like what:#define PI 3.1415926In the program: Area=pi*r*r will be replaced with 3.1415926*r*rSuppose you write the number

1) #define是预处理指令, in the compilation preprocessing simple substitution, does not make the correctness check, does not have the meaning whether correctly still brings in, only when compiles the already expanded source program only then discovers the possible error and error. For example:#define PI 3.1415926In the program: Area=pi*r*r will be replaced with 3.1415926*r*rIf you write the number 9 in the #

Define is a pre-processing command in C language. It is used for macro definition, which can improve the readability of the source code and provide convenience for programming. Pre-processing commands start with "#", for example, include commands # include and macro-defined commands # define. Usually put in front of the source file, which is called preprocessing. Preprocessing refers to the work done before

1 :__ file __,__ line __, macro expanded, Middle Layer Macro _ File _ is the predefine macro of the compiler, indicating the absolute path of the file, but ASCII characters. Suppose you want to convert _ file _ into a wide character. Maybe you want # DEFINE _ wfile _ L ##__ file __ Wchar_t pszfilepath [] =__ wfile __; In this case, the compiler will prompt that "l1_file _" is an undeclared identifier. Why? If the parameter after # Is a macro, # will

Label: style blog Io ar use for strong SP Div 1) # define is a pre-processing command. It is a simple replacement during compilation and pre-processing, and does not check the correctness. It does not mean that it is correct or not, possible errors are detected and reported only when the expanded source program is compiled. For example:# Define PI 3.1415926In the program: Area = pI * r will be replaced with

1.1. # define variant, that is, # ifndef, can prevent repeated references to header files# Ifdef and # define combinations are generally used in header files to prevent repeated references of multiple files to the same header file.In actual use, even if your header file is not referenced by multiple files, it is best to add it to increase program readability, portability, robustness, and so on.Its usage is

Today, we have compiled some # define usage to share with you!1. Simple define Definition#define MAXTIME 1000A simple maxtime is defined, it represents 1000, if it is written inside the programif (IThe compiler replaces the maxtime with 1000 before processing the code.Such a definition looks similar to a normal const definition, but it is also different because t

Reference:typedef usage Http://www.cnblogs.com/ggjucheng/archive/2011/12/27/2303238.html#define用法: http://blog.csdn.net/benny5609/article/details/2314541====typedef=====There are generally two uses for typedef: one is to give the variable a new name that is easy to remember and makes sense, and the other is to simplify some of the more complex type declarations.egtypedef int size;typedef unsigned int WORD;typedef with arrays, pointersGeneral Array Dec

Original address: http://www.manongjc.com/article/491.html Const is the definition of a class member constant, which cannot be changed after the definition, and define we define global constants so that we can access them elsewhere but not change them. Note: Define cannot be defined in a class, and a const must be defined in a class, and the const must be access

// ================================================ ========================================// Title:// How to Write elegant code (2) -- # define? Const? Or enum?// Author:// Norains// Date:/// Tuesday 21-July-2009// Environment:// Wince5.0 + vs2005// ================================================ ======================================== # Define, const, and Enum: What are the associations between the thr

1. Simple macro definition #define Identifier substitution list (alternate list can be number, string literal, punctuation, operator, identifier, keyword, Word constants quantity.) Note: The substitution list is nullable. Typical error: #define N = 100 int a[n]; /* This will become an int a[= 100], which will be processed as an identification mark. #define N

Define is a pre-processing command in C language. It is used for macro definition, which can improve the readability of the source code and provide convenience for programming.Pre-processing commands start with "#", for example, include commands # include and macro-defined commands # define. Usually put in front of the source file, which is called preprocessing.Preprocessing refers to the work done before c

A constant is an identifier (first name) of a simple value. As the name implies, the value cannot be changed during script execution (except for the so-called magic constants, they are not constants). Changshime is considered to be case sensitive. Usually, constant identifiers are always uppercase. You can use the Define () function to define constants. After PHP 5.3.0, you can use the Const keyword to

# Define is a macro definition Command provided in C language. Its main purpose is to provide programmers with some convenience in programming and improve the program running efficiency to a certain extent, however, when learning this command, you often cannot understand the essence of the command, and there is always some confusion here. The command is misused during programming, so that the running of the program is inconsistent with the expected pu