Problem 111. Find matching parenthesis

One of the most indispensable things about a great text editor for programming is the ability to quickly jump between matching parentheses. If you have a line like,
if (f(a) >= b(c, d(e*(f-g))))
it very convenient to place your cursor at, say, the second to last closing parenthesis, and have the editor show you where is the matching opening parenthesis. (In this example, it is the one just after b.)
For this problem, you should write a function that takes a string s like 'if (f(a) >= b(c, d(e*f(-g))))' and an integer n representing a character position within the string. Your function should return the index of the matching parenthesis.
For example:
>> s = 'if (f(a) >= b(c, d(e*f(-g))))';
>> find_matching_paren(s, 4)
ans =
29
>> find_matching_paren(s, 6)
ans =
8
>> find_matching_paren(s, 27)
ans =
19
You can assume that n will always be the position of either an open or closing parenthesis.
You can assume the string will always have balanced parentheses.

Solution Stats

45.18% Correct | 54.82% Incorrect
Last Solution submitted on Jun 06, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers288

Suggested Problems

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!