techpreparation-homepage

Home  Interview Questions  Certifications  Aptitude Questions  Tutorials  Placement Papers  Search  Resume  Soft Skills  Video  Forum  Blog

Android app on Google Play

Technical Interview Questions

Java Interview Questions
Unix Interview Questions
SQL Interview Questions
C# Interview Questions
                              .........More

Aptitude Interview Questions
C/C++ Aptitude Questions
C Aptitude Questions
                              .........More

Tutorials
C Tutorial
C++ Tutorial
                              .........More

Programming Source Codes
C/C++ Source Codes
C# Source Codes
                              .........More

Online Quiz
C Online Quiz
C++ Online Quiz
                              .........More

 

 
Home > C Interview Questions >

Advantages of a macro over a function ?

Macro gets to see the Compilation environment, so it can expand __ __TIME__ __FILE__ #defines. It is expanded by the preprocessor.

For example, you cant do this without macros
#define PRINT(EXPR) printf( #EXPR =%d\n, EXPR)

PRINT( 5+6*7 ) // expands into printf(5+6*7=%d, 5+6*7 );

You can define your mini language with macros:
#define strequal(A,B) (!strcmp(A,B))

Macros are a necessary evils of life. The purists dont like them, but without it no real work gets done.
 

<< Go Back to C Interview Questions. 

Have a Question ? post your questions here. It will be answered as soon as possible.

Check Object Oriented Interview Questions for more Object Oriented Interview Questions with answers

Check Data Structure Interview Questions for more data structure interview questions with answers