I ran it here using my phone: https://www.jdoodle.com/c-online-compiler https://www.jdoodle.com/c-online-compiler I copied and pasted the code from GitHub (cl

I ran it here using my phone: https://www.jdoodle.com/c-online-compiler https://www.jdoodle.com/c-online-compiler I copied and pasted the code from GitHub (click copy, rather than highlighting and copying). It ran but also outputted the number sequence a few times. It is possible when you did copy n paste the special characters were lost.