Prints before execl is not visible in output

Question

#include 
#include 
#include 
#include 
#include 

int main(void)
{
    pid_t Checksu         


        

Answer 1

Remember that output through printf (to stdout) is normally line buffered. That means the output-buffer gets flushed on newline. As you don't have a newline after the string you want to print, the output-buffer will not be flushed.

Either add a newline last in the string, or manually flush the buffers with fflush.