audacity macro

One of the advantages of preprocessing commands and macro definitions in VC Author: Liu Wei Source: blog responsibility Editor: Ark People who are new to MFC programming are often intimidated by various macro definitions and preprocessing commands generated by the MFC wizard. However, preprocessing and macro definition are a powerful tool in C languag

Many C ++ books advise us that C language macros are the first of all evil, but things are not as bad as we think, just like Goto. MacroA major role is to automatically generate code for us. If the template can generate various types of code (type replacement) for us ),In fact, macros can generate new Code (replacement and addition of symbols) on the symbols ). You can find some macro Syntax problems on Google. Believe me, you do not know as much abou

People who are new to MFC programming are often intimidated by various macro definitions and preprocessing commands generated by the MFC wizard. However, preprocessing and macro definition are a powerful tool in C language. They can be used for simple source code control, version control, warning, or some special functions.A classic exampleThe most classic example of using preprocessing and

Macro definition ' DefineRepresents a string with a specified identifier (that is, the name), which is in its general form:' Define identifier (macro name) string (macro content)such as: ' Define signal stringIts function is to specify the identifier signal instead of string, in the process of compiling preprocessing, all the signal after the command is replaced

Macro idea is a piece of program code with independent functions in the source program.Macro commands: User-defined commands. During programming, the functions used for multiple times are replaced by a macro command. Compilation includes commands, pseudo commands, and macro commands. The first two are both defined, and the last one is designed by yourself. The ad

A single line definition of a macro#define A (x) t_# #x#define B (x) #@x#define C (x) #xWe assume: x=1, then there are:A (1)------〉t_1B (1)------' 1 'C (1)------"1" . How to define macros, cancel macrosDefining macros#define [macroname] [Macrovalue]Cancel macros#undef [macroname]Common macros#define PI (3.1415926)Macros with parameters#define MAX (A,b) ((a) > (b)? (a), (b))The key is very easy to produce errors, including machine and human understan

? macro definition: In a program, the start of a # is a preprocessing instruction.#define定义宏常量can appear anywhere in the code. As shown in the following illustration:To determine whether the macro definition is correct, to take the content of the macro definition to the real program, according to the actual program. #define从本行开始, this

1. How to view macro development Before getting started, let's briefly introduce how a macro we define can be expanded in the referenced code. I use Microsoft Visual C ++ 6.0, project menu-> Settings, C/C ++ tabs, and add/P to project options, as shown in 1. Rebuild all will generate a. I file with the same name as. cpp. Open the. I file and you can see how macros are expanded in the code. Figure 1 1 Add "

Knowledge Points:1. struct structs2.typedef keywords3. Definition of macros4. The difference between a macro and a function5. File inclusion and multi-file compilation6. Conditional compilation===========================Structural bodyThink: If you now want to save a student's information, name, height, age, address, how to saveChar name[64];float height;int age;Char addr[64];1. What is struct structstruct refers to a data structure, which is a kind o

Like to read some Open-source project source, always will find that the great God's code always have some short and efficient macro definition, click to see, find obscure, not to mention learning, sometimes understanding is a difficult, but the macro definition itself is not so difficult, But write a good macro of course still need rich experience and technology,

motives A few days ago to see an interview question: Write a "standard" macro min, this macro enters two parameters and returns the smaller one, which mentions two topic points: knowing how to carefully enclose the arguments in parentheses in a macro is a side effect of a macro, such as what happens when you write the

Important: The variables are enclosed in parentheses to prevent errors and end up not required; In practical programming, it is not recommended to use macros for complex functions, which is not easy to debug. Multi-line use \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 softw

C language Macro definition tips (common macro definitions)Write good C language, beautiful macro definition is important, using macro definition can prevent errors, improve portability, readability, convenience and so on. The following is a list of some mature software commonly used

First, preface In C-language code or C + + code, macro definition #ifndef ... #define ... #endif主要是为了避免头文件重复引用, how is it a avoidance mechanism? This is related to the scope of the macro definition. Two, macro definition scope First, the scope of the macro definition in the C language standard is, starting at the defi

I didn't like macros much when I started to use the C language. Code I also have to understand. Macros can be defined in the sourceProgramBut is usually placed before. Data.Some simple macros can be replaced by equ, textequ, OR =, but macros have more complex functions. The essence of "macro" is "Replacement", but it is like "sub-process ";Therefore, there are both macro processes and

1. Knowledge Point 1.1 macro definition(1) macro definition without parameters1 #define error_message-1002#define seconds_per_day 60*60*60(2) with the parameter macro definition, this form is called the macro function, but actually is not the function#define Outputint (x) cout#define outputchar cout1.2 Inline functions

C language Macro definition summaryTurn from: http://topcool99.ycool.com/post.1797687.html A macro defines an identifier that represents a specific content. The preprocessing process replaces the value of the macro identifier that appears in the source code with the macro definition. The most common use of macros is t

In C and C + + languages, an identifier is allowed to represent a string, called a macro, which can be a constant, an expression, a string of formatting, and so on. When compiling preprocessing, all occurrences of the "macro name" in the program are substituted with the string in the macro definition, which is called "macro