A macro resembles a function in C, executes after the specified parameter is passed in, and inside the macro can contain the data step program and the conditional operation symbol.A macro variable is just a small variable 、、、、 (by the same is a great role)1: Basic syntax for macrosHow do I create a simple macro and use
Tags: style blog http io ar color OS using SP1: Macro definition in program runCall Routines -enable you-transfer information between an executing DATA step and the Macro Proces Sor.You can use the symput routine to create a macro variable, and to assign to, variable any value, is Availa ble in the DATA step.Symput routine to create a
v1--Single-parameter macros#define DRV_DEBUG 1#if DRV_DEBUG #define DRV_PRINT(x) printf(x)#else #define DRV_PRINT(x) #endifThis version of Drv_print (x) can only output a single variable--pure stringvoid foo(){ DRV_PRINT("Driver Initialize Success!");}Change the Drv_debug macro definition when you do not need to print debug information#define DRV_DEBUG 0Of course, you can define it directly.#define DRV_PRINT printfBut if the
One, delete a single macro
1, on the Tools menu, point to Macro submenu, and then click Macros.
2. In the Macro name box, click the macro (macro: an action or a set of actions that you can use to automate tasks.) You can record macros in the Visual Basic for Applications p
Macros are very rich, and if you just do a small database, the process of the program can be fully implemented with macros, without using Visual Basic. Some operations have no parameters (such as Beep), while others must specify parameters (such as OpenForm). In general, it is a good practice to set the parameters of an operation in the order of the parameters, because selecting a parameter determines the selection of the parameters that follow the parameter. Common
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
1, set up two presses, in two servers, import JMeter package2, in the Jmeter.properites remote_hosts=192.168.169.130:1099,192.168.171.55:10993. Check his port number in Jmeter-server.4, Nohup sh jmeter-server Set execution, two to start separately.Ps-ef | grep jmeter Check to make sure JMeter is openException Condition:1, in the pressure measurement process, found error error. You can check all the information in the JMX script and set the path to see the error message.2, can not determine whet
Original link: Click to open the link
C++/C macro definition (define) the Meaning of # # #
The # # # in define is commonly used for stitching strings, but in the actual use of the process, there are some subtle differences, we have a few examples to see.
#是字符串化的意思, the # that appears in the macro definition is to turn the arguments that follow in to a string;
eg
#define STRCPY__ (DST, SRC) strcpy (DST, #sr
I. macro assemblyMacro definition is implemented by a set of pseudo operations. The format is:Macro_name macro [dumny_parameter_list]... (Macro definition)EndmMacro and endm are a pair of pseudo operations. this is a macro definition between pseudo operations-a group of independent functional program code. the
The concept of macro macros is found in many languages.In general, the mechanism of a macro is to replace or expanded a macro that has already been defined at the pre-compilation stage, that is, to replace the macro by its name with the contents of the macro.The macros in Rust are different!The macros in rust are also
The macro definition is one of the three preprocessing features provided by C, and these three preprocessing include: macro definition, file inclusion, conditional compilation1macro Definition without parameters: Macro definition is also called macro substitution, macro subs
Some people say that with freemarker, but there is no use of its macros (macro), it is not really used freemarker. Is that the macro is a major feature of Freemarker.The definition of a macro can be seen in the relevant document, which is clearly described in the following, a look at its usage./WEB-INF/TEMPLATE/COMMON/COMMON.FTL:Then define in Freemarker.properti
Compiler built-in macros:
First, we will introduce several built-in macro definitions of the compiler. These macro definitions can not only help us write cross-platform source code, but also help us output useful debugging information flexibly.
The ansi c standard has several predefined macros (which are also commonly used ):
_ Line __: Insert the current source code line number into the source code;
_ File
C macro system defects, c macro DefectsI took a look at the boost preprocessor library a little over the past two days. I found that the boost madmen used various tricks to define various data types and structures, and also defined various operations such as addition, subtraction, multiplication, division, and so on, in the process of quick browsing, we also caught a variety of well-known
6. Description of using macros
The description of macro operations is not mandatory, but it makes macros easier to understand and maintain.
SQL expressions cannot be used in the macro "condition" column.
Generally, a macro is executed for testing only. You can append a macro to a form, report, or control to respond
When we talk about macros in C + +, the first thing we think about is "#define", and its basic syntax looks like this:1 #define macroname (para1, Para2, Para3, ..., Paran) macro-bodyThe declaration of a macro is similar to a normal function declaration, but there is an essential difference between the two: C + + functions execute code Snippets at runtime (runtime), while macros execute code snippets at the
Recently, a large number of Excel files in the company have discovered an office macro virus. They cannot be killed when using Kingsoft 360. Downloading Kingsoft version's macro virus excludes only part of the virus, another type of macro virus cannot be killed in any way.
Attack symptoms
Office macro virus exclusi
To write a good C language, a beautiful macro definition is very important. Macro definitions can help us prevent errors, improve code portability and readability, and more.In the software development process, there are often common or common functions or code snippets that can be written as functions or encapsulated as macro definitions. So is the function good
Access macro control program 4. common macro operations
Access macro control program 4. common macro operations
Macro operations are very rich. If you just create a small database, the process of the program can be fully implemented using macros without using Visual Basi
The macro usage scope in Rust 1.7.0 contains three scenarios:The first case is that the macro is defined in the current file. This file may be the default module for crate, or it may be a random module.Another scenario is that the macro is defined in the current crate. But not in the current file, but in other module modules.The third case is that the
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.