Answer 1

You can use strtok() to find the delimiter character, i.e. " ", and atoi() to do the actual conversion, and repeat this procedure until the end of the string has been reached (no more delimiter tokens).

strtok:
https://en.cppreference.com/w/c/string/byte/strtok

atoi:
https://en.cppreference.com/w/c/string/byte/atoi