static (int, long, TimeSpan, bool) test_stack(int _len)
{
MyStack.N_op = 0;
int max = _len;
int[] sh_ar = get_shuffled_array(_len, max);
//long ellapledTicks = DateTime.Now.Ticks;
TimeSpan Time1 = DateTime.Now.TimeOfDay;
MyStack stack = new MyStack(_len);
for (int i = 0; i < sh_ar.Length; i++)
{
stack.Add(sh_ar[i]);
}
stack.quicksort(0, stack.TopPointer - 1);
//ellapledTicks = DateTime.Now.Ticks - ellapledTicks;
TimeSpan Time2 = DateTime.Now.TimeOfDay;
TimeSpan time_result = Time2 - Time1;
long N_op = MyStack.N_op;
bool success = is_stack_sorted(stack.GetCopy());
return(_len, N_op, time_result, success);
}