Bunker array

Question :
A Bunker array is defined to be an array in which at least one odd number is immediately followed by its square. So {4, 9, 6, 7, 49} is a Bunker array because the odd number 7 is immediately followed by 49. But {2, 4, 9, 3, 15, 21} is not a Bunker array because none of the odd numbers are immediately followed by its square.

Write a function named isBunkerArray that returns 1 if its array argument is a Bunker array, otherwise it returns 0.

If you are programming in Java or C#, the function signature is
   int isBunkerArray(int [ ] a)

If you are programming in C or C++, the function signature is
   int isBunkerArray(int a[ ], int len) where len is the number of elements in the array.

public static int isBunkerFunction(int [] a)

        {

            int rtnVal = 0;

            for(int i=0;i<a.Length-1;i++)

            {

                if(a[i]%2==1)

                {

                    int n=isSquareNum(a[i]);

                    int nextSq=a[i+1];

                    if(n==nextSq)

                    {

                        rtnVal = 1;

                        break;

                    }

                }

            }

            return rtnVal;

        }

 public  static int isSquareNum(int n)

        {

            return n * n;

        }