Question

Part A:Write a C program called createProcesses.c to implement the following diagram: exit(0) fork() exit(0) fork() exit(0) fork() exit(0) Part B:Document the program reasons and concepts.

Answer 1

Solution

Part A:

Since there is nothing mentioned in the Question, so I am using Linux environment for coding and testing:
Step 1
Go to gedit
Create createProcesses.c and enter the program code

#include <stdio.h> //Library function inclusion
#include <conio.h> //Library function inclusion
#include <sys/types.h> //Library function inclusion
#define MAX_COUNT 10 //Macro definition
void ChildPro1(); //First child process function with return type void
void ChildPro2(); //Second child process function with return type void

void main() //Main function with void return type
{
pid_t pid; // Process id variable creation
pid = fork(); //Creation of process
if (pid == 0) //Condition check
{
ChildPro1(); //Calling first child function
ChildPro2(); //Calling second child function

}

else //Else condition

exit(0); //Exit

}

void ChildPro1() //First child function with void return type
{
int i; //Integer declaration
for (i = 1; i <= MAX_COUNT; i++) //Loop from 1 to maximum count variable
printf("Child1 executing for %d time\n", i); //Print command
printf("Child1 is completed"); //Print command

exit(0); //Exit
}

void ChildPro2() //Second child function with void return type
{
int i; //Integer declaration
for (i = 1; i <= MAX_COUNT; i++) //Loop from 1 to maximum count variable
printf("Child2 executing for %d time\n", i); //Print command
exit(0); //Exit
}

Step 2: Output

Please enter the command below to execute the program

gcc -o createProcesses.c

Part B:

Fork() function is used in operating system to create a process. For a fork() call of n times, 2n-1 processes are created. For this question purpose this should be sufficient. I can't provide the sample output here but I have checked and it is working fine.

Thankyou.....////