printf just before a delay doesn't work in C

Question

Does anyone know why if i put a printf just before a delay it waits until the delay is finished before it prints de message?

Code1 with sleep():

int          


        

Answer 1

When you call printf, you don't print anything until really necessary: until either the buffer fulls up, or you add a new line. Or you explicitly flush it.

So, you can either do

printf("Something\n");
delay();

or

printf("Something");
fflush(stdout);
delay();