What are the predefined macros?
What are the predefined macros?
Predefined Macros in C99 standard: This macro gives value similar to __STDC_VERSION__, in that it expands to a version number. __OBJC__ Macro:: __OBJC__ Macro has value 1 if the Objective-C compiler is in use. __OBJC__ is used to test whether a header is compiled by a C compiler or an Objective-C compiler.
What are predefined macros in C language?
C Predefined Macros
| No. | Macro | Description |
|---|---|---|
| 1 | _DATE_ | represents current date in “MMM DD YYYY” format. |
| 2 | _TIME_ | represents current time in “HH:MM:SS” format. |
| 3 | _FILE_ | represents current file name. |
| 4 | _LINE_ | represents current line number. |
Where is __ Clr_ver defined?
__CLR_VER is defined if the /clr compiler option is set. Otherwise, undefined.
What is $( IntDir?
$(IntDir) Path to the directory specified for intermediate files. If it’s a relative path, intermediate files go to this path appended to the project directory. This path should have a trailing slash. It resolves to the value for the Intermediate Directory property.
What are macros in C pros and cons?
The advantage of macro is that it reduces the time taken for control transfer as in the case of function. The disadvantage of it is here the entire code is substituted so the program becomes lengthy if a macro is called several times.
What is macro in C Plus Plus?
Macros: Macros are a piece of code in a program which is given some name. Whenever this name is encountered by the compiler the compiler replaces the name with the actual piece of code. The ‘#define’ directive is used to define a macro.
What is __ Declspec?
The __declspec keyword enables you to specify special attributes of objects and functions. For example, you can use the __declspec keyword to declare imported or exported functions and variables, or to declare Thread Local Storage (TLS) objects.
Where is Msbuildtoolspath?
Under C:\Program Files (x86)\MSBuild\14.0\Bin there are other files like: Microsoft. Common. targets, Microsoft.
Why are macros bad?
when defining macros for magic numbers, the compiler retains no type information for the defined values. This can cause compilation warnings (and errors) and confuse people debugging the code. when defining macros instead of functions, programmers using that code expect them to work like functions and they do not.
What are macros good for?
Macros are of course proteins, carbohydrates and fats. The word “macro” simply means large, because these are the nutrients the body needs in large quantities for energy, growth, tissue repair, immune function, metabolism and other essential functions in the body.
What are advantages of macros?
A macro is defined with the preprocessor directive, #define. The advantage of using macro is the execution speed of the program fragment. When the actual code snippet is to be used, it can be substituted by the name of the macro.
What are preprocessor macros in C programming?
C Preprocessor and Macros Including Header Files: #include. The #include preprocessor is used to include header files to C programs. Macros using #define. A macro is a fragment of code that is given a name. Function like Macros. You can also define macros that work in a similar way like a function call. Conditional Compilation. Predefined Macros.
What is the function of macros?
A macro is simply a pattern that specifies how a sequence of functions are to be performed. A simple explanation for a lay user would be that macros are used to automate tasks to make software less repetitive in its functions.
