Familiarization of System Calls

Algorithm

Step 1: Initialize Data

• Declare and initialize an array with 10 integers.
• Initialize variables to store the sum of even and odd numbers.

Step 2: Create a Child Process

• Call the fork() system call to create a new process.

Step 3: Parent Process Execution

• If fork() returns a positive value, the process is the parent.
• Traverse the array.
• Add all even numbers.
• Display the sum of even numbers.

Step 4: Child Process Execution

• If fork() returns zero, the process is the child.
• Traverse the array.
• Add all odd numbers.
• Display the sum of odd numbers.

Step 5: Terminate Program

• End execution of both parent and child processes.

Program

#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <unistd.h>

int main() {
  int a[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
  int sumOdd = 0, sumEven = 0, n, i;
  n = fork();

  if (n > 0) {
    for (int i = 0; i < 10; i++)
      if (a[i] % 2 == 0)
        sumEven += a[i];

    printf("Parent Process:\n");
    printf("Sum of even numbers is %d\n", sumEven);
  } else {
    for (int i = 0; i < 10; i++)
      if (a[i] % 2 != 0)
        sumOdd += a[i];

    printf("\nChild Process:\n");
    printf("Sum of odd numbers is %d\n", sumOdd);
  }
}