Writing Recursive Functions:
No loops are permitted in any of the code you write (not even in the test functions or helper
functions).The goal is to practise recursion.
Write function and a test function using assert statements.
You can use helper functions if you like.
// Pre-condition: // none // Post-condition: // Returns a copy of s, but with all leading and trailing
spaces removed. // No other characters are changed. For example, strip(" ab c d ") // returns "ab c
d". If s is the empty string, or a string of all spaces, // then "I" is returned. // Constraints: // Must
be implemented using recursion (and no loops). You can write helper // functions if necessary.
string strip(const string& s); void strip_test();