macro recorder program

The macro in the forum. C/C ++ summarizes various compilation commands in the source code of the C program. These commands are called preprocessing commands. Although they are not actually part of the C language, they extend the C programming environment. This section describes how to use preprocessing programs and annotations to simplify the program development

, the advantage of this method is that you can print the expression content in a unified way. Similarly, the following macro can be defined to print the values of other expressions: # Define printc (expr) printf (" # Define printf (expr) printf (" # Define printd (expr) printf (" In the GCC compiler, two string constants can be connected to a new string. Strings are equivalent as follows: "123456" and "123" 456" Because # expr is essentially a string,

Access using macro control program 3. Use Conditions in macros Access using macro control program 3. Use Conditions in macros In some cases, you may want to perform one or more operations in a macro only when the specified condition is true. For example, if a

Preface: When writing a program, we always add some printf and other statements to output debugging information, however, the most inconvenient part of the printf statement is that when we need to release a program, we need to delete these statements one by one. Once we need to debug the program again, these statements have to be added one by one, which makes us

access| Program | A control macro refers to a collection of one or more actions, each of which implements a specific function, such as opening a form or printing a report. Macros enable certain common tasks to be completed automatically. For example, you can set up a macro that runs the macro when the user clicks a com

Demand:Because of the large amount of data in Excel, which contains several macro programs to read data from other data sources, running a macro takes a long time, in order not to affect the use, the need to run the Excel macro (no parameters) every night, Excel on the common disk.Solution:SharePoint wrote a timejob,timejob every day to run a macro.Write Timejob

Program --- C language details 28 (const variable initialization, array size with const variable details, const variable and # define macro, volatile modification)Main Content: const variable initialization, array size using const variable details, const variable and # define macro, volatile Modification 1. the const variable must be assigned a value during initi

To display messages from the program in the "output" Window of the debugger, you can use the ATLTrace macro or the MFC Trace macro. The TRACE macro only works in the program's "Debug" version and will disappear during compilation in the "Release" version.The following example shows the usage of Several TRACE macros. Si

Code, using the __DATE__ macro, get the program compile time, how to ensure that every compile code (non-regeneration mode), can update the value of __date__?Workaround: In the pre-build command for VS, add batch commands, delete the corresponding obj file, force each compilation to recompile the corresponding CPP file as followsDel Obj\debug\main.objDel Obj\release\main.objCode, using the __DATE__

program almost always calls APIs outside the standard library. These APIs may not be cross-platform. Therefore, the first point to note when writing C ++ programs that are easy to transplant is: if you have a choice, use cross-platform APIs as much as possible.For example, for file operations, the Windows 32 API and the file operation functions provided by the UNIX operating system are different. Which one should I choose? Are not suitable, it is bes

6.1 Global Variables6.2 Compilation preprocessing6.3 Large Program Structure6.1 Global VariablesGlobal variablesVariables defined outside the function are global variablesGlobal variables have global lifetimes and scopesThey have nothing to do with any function.They can be used inside any functionGlobal variable InitializationA global variable that does not initialize will get a value of 0The pointer will get a null valueGlobal variables can only be i