Having difficulty with this question

I didnt do it right apparently

me CS 11 Quiz4 Signature leave out ry 28, 2017 gs) (3 points) Write a function, diagonal, that takes two parameters, a 2D array of char, theBoard, and a single char, thePlayer. The function should assume that theBoard is square. The function should return true if every element on the diagonal is equal to thePlayer, and return false otherwise. Chor ezval trve else