Research on Swift

Update c++ this afternoon

Recently, I suddenly wanted to study swift, so I made this program.

Effect:

 

The third point is random can be random

Tutorial (should only be available on ios or mac, don't try others) 

First open the app store, search for Swift playgrounds, and download

Then click on the bottom right corner to view all

Find about me, click get

Then click it after downloading, it's my interface, you can modify the code yourself, it's not difficult

See it for yourself