C Programming, Linux, Unix If you already answer this question, please I need al

Question

C Programming, Linux, Unix

If you already answer this question, please I need alternative answer from someone else. Thanks.

Question: Including the initial parent process, how many processes are created by the program? And what is the value of i before each process terminates? Please draw the parent-child process hierarchy to justify your answer.

#include<stdio.h>

#include<unistd.h>

int main() {

          int i = 0;

          if (fork() == 0) {

                     ++i;

                     if (fork() != 0)

                             i = 3;

                     else ++i; fork();

          }   else   {

                      i = 5;

                      if (fork() == 0)

                                   ++i;

           }

           return 0;

}

Explanation / Answer

Lets get the parent child and process by printing the value of i .please check at end

#include <stdio.h>

int main()
{
int i = 0;
if (fork() == 0) {
++i;
printf("%d ",i);
if (fork() != 0){
i = 3;
printf("%d ",i);
}
else {
++i; fork();
printf("%d ",i);
}
} else {
i = 5;
if (fork() == 0)
++i;
printf("%d ",i);
}
return 0;
}

output

5 1 6 3 2 2

Total Number of Processes = 2n where n is number of fork system calls. So here n=3, 2^4 = 16 .there should be 16 process but we have conditions of if and else which reduced it to one parent and 5 child process.the value of i is in output before process terminate are 1 6 3 2 2

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