Matchstick game(logic)

Question

you have total 21 sticks. one player can pick 1,2,3or 4 sticks. user wii start the game. the player who have to pick the last stick will lose the game. make sure computer must always win.
write a program for this code in various languages.

Answer 1

if it is your turn, at the end good numbers are
2,3,4,5

so the other one should have 6

to achieve that, good numbers for you are

7,8,9,10

so the other should have 11

good numbers for you

12,12,14,15

the other should have 16

good numbers for you

17,18,19,20
the other should have 21

The Beginner is always the looser

The other takes (sticks mod 5 ) -1

@rjprince is the same rule: other took + youtook is always 5.

Answer 2

https://code.sololearn.com/c4ptFH28R0yp/?ref=app
this is my code in c++

Answer 3

https://code.sololearn.com/ctYiE4MeYGtV/?ref=app

Answer 4

this is my code in c language
https://code.sololearn.com/c155hiA3wIB6/?ref=app

Answer 5

I was try, in c# check this:
https://code.sololearn.com/c0m6PzThmL2d/?ref=app

Answer 6

I want this code in php or JS.