Why does process child execute some unexpected line?

Question

So I\'m getting to know how processes work and have written some simple code.

#include 
#include 
#include 
#i         


        

Answer 1

If you write

printf("Heeeyoooo!");
fflush(stdout);

and then fork, the error goes away. The reason is that fork() clones the output buffer for stdout while "Heeeyoooo!" is still in it, so it is subsequently printed twice.