Write a function mysubstr() in C that doesn’t use any string function, doesn’t use any loop and prints substring of a string. The function should not modify contents of string and should not use a temporary char array or string.
For example mysubstr(“geeksforgeeks”, 1, 3) should print “eek” i.e., the substring between indexes 1 and 3.
One solution is to use recursion. Thanks to Gopi and oggy for suggesting this solution.
How to do it if recursions is also not allowed?
We can always use pointer arithmetic to change the beginning part. For example (str + i) gives us address of i’th character. To limit the ending, we can use width specifier in printf which can be passed as an argument when * is used in format string.
This article is contributed by Rahul Jain. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above