Running application from cpp

Question

when I was working with .bat files, I could open an application from within my file running, is there a way to do that with c++? and how

Answer 1

Yeah, use CreateProcess() on Windows using Win32 API.

Answer 2

I don't know, maybe fork()?

Answer 3

maybe execv function

https://linux.die.net/man/3/execv

Answer 4

how about for Linux?