Using your UNIX/LINUX C compiler run the following program with these 3 different options:

a) Displaying the output on the screen.

b) Directing the output to a file (using ">").

c) Append the output (using ">>") to another file few times.

How many times does the program display "I'm Alive!" for each of the above three cases?

Comment the fflush(stdout) statements out and run the program again. Explain your answer.

Run the program on your machine and on other Linux machines you have access to and compare your findings.

Depending on your compiler you may have to include other header files.

#include

#include

main ()

{

int k;

printf ("Main Process' PID = %d ", getpid());

fflush(stdout);

for (k = 1; k <= 3; k++)

{

fork ();

printf ("k = %d, PPID = %d, pID = %d, I'm Alive! ", k, getppid(), getpid());

fflush(stdout);

}

}