Diagonal Matrices

3a)

/*
 * <summary> This function determines if a square matrix  is descending diagonal </summary>
 * <params>
        "matrix" = The array containing the int elements
        "size" = Number of elements both row and column-wise
   </params>
 * <return> "1" : Is desc diagonal,   "0": Otherwise  </return>
 * <precond> "size" > 0 </precond>
 */
int isDescDiagonal(int matrix[][MAX_SIZE], int size)
{
    int row, col;

    for(row = 0; row < size; row++)
    {
        //Ignore row-0 col-0, it can be any value
        for(col = 1; col < size; col++)
        {
            //Diagonal
            if(row == col)
            {
                /* Not concurrently descending */
                if(matrix[row-1][col-1] - 1 != matrix[row][col])
                    return 0;
            }
            /* If non-diagonal elements are not zero */
            else if(matrix[row][col] != 0)
                return 0;
        }
    }

    return 1;
}

3b)

/*
 * <summary> This function determines if a square matrix  is anti-diagonal </summary>
 * <params>
        "matrix" = The array containing the int elements
        "size" = Number of elements both row and column-wise
   </params>
 * <return> "1" : Is anti diagonal,   "0": Otherwise  </return>
 * <precond> "size" > 0 </precond>
 */
int isAntiDiagonal(int matrix[][MAX_SIZE], int size)
{
    int row, col;

    for(row = 0; row < size; row++)
    {
        for(col = 0; col < size; col++)
        {
            //Diagonal
            if(row+col != size - 1)
            {
            /* If non-diagonal elements are not zero */
                if(matrix[row][col] !== 0)
                    return 0;
            }
        }
    }

    return 1;
}