Tags: Table add innerhtml Cancel. NET NPU ret get link/*When the page is loaded, the Click event is incremented for each TD so that no changes can be made to each page.Add Click event Properties. The SetAttribute method cannot be used here.*/Onclick=addobjoftext;Click the event to update the TD content to a Div, where a text is loaded, for the user to enter a new TD value,A OK button, a Cancel button, to save or cancel the user's input.A hidden that stores the value of TD before the user enters
The difference between #define, const, typedef#define is not defining variables, it's just for text substitution.For example:#define PI 3.1415926float Angel;angel=30*pi/180;Then, when the program is compiled, the compiler will first "#define PI 3.1415926" after the "PI" in all the code is replaced by "3.1415926"and the
After the "Microsoft Script Editor" is installed, an application named mdm.exe ("Computer debugging manager" is used to provide the applicationProgramDebugging) the program will be installed at the same time, and the result is that this stuff causes
Definition:
The # define Directive
You can use the # define directive to give a meaningful name to a constant in your program. The two forms of the syntax are:
Syntax
# Define identifier token-stringopt
# Define identifier [(identifieropt,..., identifieropt)] token-stringopt
Usage:
1.SimpleDefineDefinition
#
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 definitions are also available in our common stdio.h header files, such as:
#define BUFSIZ 1024//Buffer size
#define EOF ( -1
Jency LeeLinks: http://www.cnblogs.com/Jency/articles/C_Cplusplus_define.html1. Simple define Definition #define MaxTime + A simple maxtime is defined, which represents 1000 if you write in the program if (i Compiler replaces maxtime with 1000 before processing the code. The definition of looks similar to a normal const definition, but it is also different because the definition of
# 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, students often cannotUnderstanding the essence of this command always creates some confusion here. This command is misused during programming to make the program run differently from the expected purpose, or when reading a program written
. Let's take a closer look at the msdn example and have a good understanding.
The following is an example of how to define a Unified Version macro.
Assume that the project contains the resource script file resource. RC, and the unique version number is stored in define. h. Other CPP files that require version numbers contain this file.
Let's take a look at define
For a long time, macro definition # define is used to define some simple constants. At most, it is used to define a function. It seldom pays attention to macro definition usage. Until the following code is displayed:
#define PLAYSOUNDEFFECT(...) \[[GameManager sharedGameManager] playSoundEffect:@#__VA_ARGS__]
I have
The difference between define () and const in php is described in detail. In php, both define () and const () can define constants. So what is the difference between define () and const? many programmers do not understand this, next I will introduce some differences between define
In php, both define () and const () can define constants. So what is the difference between define () and const? many programmers do not understand this, I will introduce you
In php, both define () and const () can define constants. So what is the difference between
The Define () function defines a constant.define () functions: Defines a constant. Constants is much like variables, except for the following differences: constants [constant] and variables [variable] There are many similarities, so it is easy to confuse; Let's enumerate the differences between constants [constant] and variables [variable]: A constant's value cannot be changed after it is set a constant value cannot be changed after it has been specif
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
Http://blog.sina.com.cn/s/blog_686188ef0100klku.html#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning, always create some confusion here, in the programming of the misuse of the command, To make the program run inconsistent with the intended purpose, or to rea
#define是C语言中提供的宏定义命令, the main purpose is to provide programmers with certain convenience in programming, and to a certain extent, improve the efficiency of the program, but students often do not understand the nature of the command in learning, always create some confusion here, in the programming of the misuse of the command, To make the program run inconsistent with the intended purpose, or to read the program written by others, the results of the
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 used in the statement. Compared
with 1, the province wrote Test
(3)
typedef struct TEST
{int x; int y;
} TEXT1,TEXT2;
Only said that the structure of 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 c
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