C subscripted value is neither array nor pointer nor vector when assigning an array element value

Question

Sorry for asking the already answered question, I am a newbie to C and don\'t understand the solutions. Here is my function

int rotateArr(int *arr) {
    int         


        

Answer 1

You are not passing your 2D array correctly. This should work for you

int rotateArr(int *arr[])

or

int rotateArr(int **arr) 

or

int rotateArr(int arr[][N]) 

Rather than returning the array pass the target array as argument. See John Bode's answer.