What does the #pragma once directive do in C preprocessing?
A. Prevents multiple inclusion of header files
B. Defines a macro
C. Checks for syntax errors
D. Excludes code
Answer: Option A
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Related Questions on C Preprocessor
What is the purpose of the C preprocessor in C programming?
A. Compile C code
B. Optimize code
C. Preprocess code before compilation
D. Execute code
A. #define
B. #include
C. #ifdef
D. #pragma
What is the purpose of the #define directive in C preprocessing?
A. To include a header file
B. To define a macro
C. To declare a constant
D. To declare a variable
In C, which directive is used to conditionally include code based on preprocessor macros?
A. #ifdef
B. #ifndef
C. #if
D. #else
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