ex13.31 answer, swap haven't been called

[sunlianqiang]

ex13.31 answer, swap haven't been called.
sort called operator < which has been override, but didn't call the swap function.

@pezy @Mooophy

[pezy]

please show your own code.

[MRamez]

Hi,
Insertion sort is faster than quick sort for small inputs. I think here gcc uses insertion sort instead of quick sort, which requires no swapping. Give your vector more elements (more than 20) and check if swap is called.