c - execl & printf - order -

i have small problem this:

{   printf ("abc");   execl("./prog","prog",null); } 

all works fine, why execl run before printf? me?

the printf run first, it's output buffered.

you can flush buffer either adding newline (\n) end of string or calling fflush(stdout):

 printf("abc\n"); 

or:

printf("abc"); fflush(stdout);