void BubbleSort(int *array, int length)
{
    int i,j,t;
    for(j=0; j<length-1; j++)
    {
        for(i=0;i<length-j-1;i++)
        {
            if(array[i] >= array[i+1])
            {
                t = array[i];
                array[i] = array[i+1];
                array[i+1] = t;
            }
        }
    }
}