Please explain the code below step by step in detail. As im so confused on what int is$\_$parent$=$fork$()$ and if$($is$\_$parent$)$ do$.$ Also, how to get the output ABBCC or ABCBC.

code:

#include

#include

#include

int main$()$

$\{$

printf$($A$)$;

int is$\_$parent $=$ fork$()$;

printf$($B$)$;

if $($is$\_$parent$)$

wait$($NULL$)$;

printf$($C$)$;

$\}$

Two possible answers. ABBCC or ABCBC.