C | Macro & Preprocessor | Question 14
What is the output of following program?
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#include <stdio.h>#define macro(n, a, i, m) m##a##i##n#define MAIN macro(n, a, i, m) int MAIN(){ printf("GeeksQuiz"); return 0;} |
(A) Compiler Error
(B) GeeksQuiz
(C) MAIN
(D) main
Answer: (B)
Explanation: The program has a preprocessor that replaces “MAIN” with “macro(n, a, i, m)”. The line “macro(n, a, i, m)” is again replaced by main. The key thing to note is token pasting operator ## which concatenates parameters to macro.
Quiz of this Question
