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Write a C program to Implement a system of three processes which read and write numbers to a file. Each of the three processes P1, P2, and P3 must obtain an integer from the file (these instructions must be executed 200 times). The file only holds one integer at any given time. Given a file F, containing a single integer N, each process must perform the following steps 1. Fork two processes For 200 times: 2. Open F 3. Read the integer N from the file 4. Close F 5. Output N and the process' PID (On the screen) 6. Increment N by 1 7. Open F 8. Write N to F (overwriting the current value in F) 9. Close F

Write a C program to Implement a system of three processes which read and write numbers to a file. Each of the three processes P1, P2, and P3 must obtain an integer from the file (these instructions must be executed 200 times). The file only holds one integer at any given time. Given a file F, containing a single integer N, each process must perform the following steps 1. Fork two processes For 200 times: 2. Open F 3. Read the integer N from the file 4. Close F 5. Output N and the process' PID (On the screen) 6. Increment N by 1 7. Open F 8. Write N to F (overwriting the current value in F) 9. Close F

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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← 8:12 ANSWERED Wednesday, Sep 28, 2022 ENGINEERING COMPUTER-SCIENCE Write a C program to Implement a system of three processes which read and write numbers to a file. Each of the three processes P1, P2, and P3 must obtain an integer from the file (these instructions must be executed 200 times). The file only holds one integer at any given time. Given a file F, containing a single integer N, each process must perform the following steps 1. Fork two processes For 200 times: 2. Open F 3. Read the integer N from the file 4. Close F 5. Output N and the process' PID (On the screen) 6. Increment N by 1 7. Open F 8. Write N to F (overwriting the current value in F) 9. Close F b) Briefly describe why the processes P1, P2, and P3 obtain/read duplicates of numbers (why does a particular integer x appear in the output of more than one process)? Suggest a solution (you do not need to implement it) √x 8
Transcribed Image Text:← 8:12 ANSWERED Wednesday, Sep 28, 2022 ENGINEERING COMPUTER-SCIENCE Write a C program to Implement a system of three processes which read and write numbers to a file. Each of the three processes P1, P2, and P3 must obtain an integer from the file (these instructions must be executed 200 times). The file only holds one integer at any given time. Given a file F, containing a single integer N, each process must perform the following steps 1. Fork two processes For 200 times: 2. Open F 3. Read the integer N from the file 4. Close F 5. Output N and the process' PID (On the screen) 6. Increment N by 1 7. Open F 8. Write N to F (overwriting the current value in F) 9. Close F b) Briefly describe why the processes P1, P2, and P3 obtain/read duplicates of numbers (why does a particular integer x appear in the output of more than one process)? Suggest a solution (you do not need to implement it) √x 8
Expert Solution
Step 1

Program Description

  • Declare two pointers to read from and write to the file input.txt.
  • Use the fork function to fork two processes.
  • Get the process ID of the function using pid.
  • Iterate 200 times and do the following:
    • Scan the file and read the integer to N.
    • Print N and Process ID.
    • Increment N.
    • Write N to the file.
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