Q: An int array, devide an array of integers into two parts, odd in the first part, and even in the second part.

We need some sub Function:
1: IsEven(int n) // n is Even or not
2: void Reorder(int *pData, unsigned int length, bool (*func)(int));

void Reorder(int *pData, unsigned int length, bool (*func)(int))
{
    if (Null==pData || length==0)
        return;
    //
    int *Pbegin = pData;
    int *Pend = pdata+length-1;
    //
    while(Pbegin<Pend)
    {
        if(!func(*Pbegin))
        {
            Pbegin++;
            continue;
        }
        //
        if(func(*Pend))
        {
            Pend--;
            continue;
        }
        //Swap
        int temp;
        temp = * Pbegin;
        *Pbegin = *Pend;
        *Pend = temp;
    }    

}

bool IsEven(int n)
{
    return(n&1)==0;
}

void ReorderOddEven(int *pData, unsigned int length)
{
      Reorder(pData, length, isEven);
}