unix only working program without put looks like the one in the question. please follow the question and the output should look like the one that is provided in the question please.

dont copied the question from chegg i cheked them and they are not working right .

only using the signal mechanism system call (don't use wait() or pipe(), you may still need sleep()). You can still write or read to the disk. You should have one parent process and one child process only.

Your output should look this

x = 19530

ITERATION 1

Parent : x = 19525

Child : x = 3905

ITERATION 2

Parent : x = 3900

Child : x = 780

ITERATION 3

Parent : x = 775

Child : x = 155

ITERATION 4

Parent : x = 150

Child : x = 30

ITERATION 5

Parent : x = 25

Child : x = 5