README.md

Process Scheduling Algorithms ⚙️💻

This repository contains C++ implementations of various process scheduling algorithms:

• First Come First Serve (FCFS)
• Shortest Remaining Time First (SRT)
• Round Robin (RR)
• Shortest Job First (SJF)

Description 🎯

Each algorithm is implemented in its respective file. The main program, main.cpp, reads process information from input files, simulates the scheduling algorithms, and prints out the results.

Files 🗂

• PCB.h: Defines the Process Control Block (PCB) structure used to represent individual processes.
• PCBFuns.h: Contains helper functions used in scheduling algorithms.
• algorithms.cpp: Contains implementations of the scheduling algorithms.
• main.cpp: The main program that orchestrates the simulation and prints results.
• processes/: Directory containing input files for different scheduling algorithms.

How to Use 👩🏻‍💻

1. Compilation: Compile the program using a C++ compiler. For example:
   g++ main.cpp -o scheduler

2. Input Files: Prepare input files in the processes/ directory. Each input file should follow the format specified below:

   <context_switch_time> <quantum_time> 
   <process_id> <arrival_time> <CPU_burst_time> <size_in_bytes>

3. Execution: Run the compiled program, providing the number of processes as a command-line argument. For example:

4. Output: The program will display Gantt charts and various statistics for each scheduling algorithm.

Input File Format 📑

Each input file should contain the following information:

• The first line specifies the context switch time and quantum time.

• Each subsequent line represents a process, with the following fields separated by spaces:

  • • Process ID
  • • Arrival time
  • • CPU burst time
  • • Size in bytes

• Example input file (FCFS.txt):

  2 4
  1 0 8 1024
  2 1 6 512
  3 3 10 2048

Output 💻

The program generates Gantt charts and calculates the following statistics for each scheduling algorithm:

• Average Waiting Time
• Average Turnaround Time
• CPU Utilization Rate