How to get my timer correct? Using chrono

Question

I create a vector and an array to compare their time.
When I separated them to compile it works fine.
But when I combined two things in one file. Those time become junk number.
How could I fix it?

https://code.sololearn.com/cVI4m6Meulou/?ref=app

Answer 1

advice: use clock_t instead of chrono, much easier.