searching in fork()
Prerequisite – fork() in C, sorting in fork()
Problem statement – Write a program to search the key element in parent process and print the key to be searched in child process.
Examples –
Input :
Key = 10;
array[5] = {3, 8, 4, 10, 80};
Output:
Parent process
key is present in array
Child process
numbers to be search is 10
Explanation – Here, we had used fork( ) function to create two processes one child and one parent process.
- fork() returns value greater than 0 for parent process so we can perform the searching operation.
- for child process fork() returns 0 so we can perform the print the value of key to be searched.
- Here we are using a simple searching algorithm to search the key element in the given array.
- We are using the returned values of fork() to know which process is a child or which is a parent process.
Note – At some instance of time, it is not necessary that child process will execute first or parent process will be first allotted CPU, any process may get CPU assigned, at some quantum time. Moreover process id may differ during different executions.
Code –
// C++ program to demonstrate searching // in parent and printing result // in child processes using fork() #include <iostream> #include <unistd.h> using namespace std; // Driver code int main() { int key = 10; int id = fork(); // Checking value of process id returned by fork if (id > 0) { cout << "Parent process \n"; int a[] = { 3, 8, 4, 10, 80 }; int n = 5; int flag; int i; for (i = 0; i < n; i++) { if (a[i] != key) { flag = 0; } else { flag = 1; } } if (flag == 1) { cout << "key is not present in array"; } else { cout << "key is present in array"; cout << "\n"; } } // If n is 0 i.e. we are in child process else { cout << "Child process \n"; cout << "numbers to be search is "; cout << key; } return 0; } |
chevron_right
filter_none
Output –
Parent process key is present in array Child process numbers to be search is 10
This article is contributed by Pushpanjali Chauhan. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
Don’t stop now and take your learning to the next level. Learn all the important concepts of Data Structures and Algorithms with the help of the most trusted course: DSA Self Paced. Become industry ready at a student-friendly price.
Recommended Posts:
- Searching in a map using std::map functions in C++
- Pattern Searching using C++ library
- fork() in C
- Fork CPP | Course Structure
- sorting in fork()
- Fork() - Practice questions
- fork() and Binary Tree
- Difference between fork() and exec()
- C vs BASH Fork bomb
- Multiple calculations in 4 processes using fork()
- Creating multiple process using fork()
- Factorial calculation using fork() in C for Linux
- C program to demonstrate fork() and pipe()
- Creating child process using fork() in Python
- fork() to execute processes from bottom to up using wait()
- Calculation in parent and child process using fork()
- fork() and memory shared b/w processes created using it
