A C Programming Language Puzzle

Give a = 12 and b = 36 write a C function/macro that returns 3612 without using arithmetic, strings and predefined functions.

We strongly recommend you to minimize your browser and try this yourself first.

Below is one solution that uses String Token-Pasting Operator (##) of C macros. For example, the expression “a##b” prints concatenation of ‘a’ and ‘b’.

Below is a working C code.

#include <stdio.h>
#define merge(a, b) b##a
int main(void)
{
    printf("%d ", merge(12, 36));
    return 0;
}

Output:

3612

Thanks to an anonymous user to suggest this solution.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above



My Personal Notes arrow_drop_up

Article Tags :
Practice Tags :



Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.