A C Programming Language Puzzle

2.1

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 here.

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

GATE CS Corner    Company Wise Coding Practice

Recommended Posts:



2.1 Average Difficulty : 2.1/5.0
Based on 21 vote(s)










Writing code in comment? Please use ide.geeksforgeeks.org, generate link and share the link here.