Readme.md

Author: AshmitaBarthwal

Preemptive Scheduling Algorithm/Readme.md

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+# Ripple Effect Scheduling (RES) Algorithm in C
+
+This project implements the **Ripple Effect Scheduling (RES)** algorithm in C, a priority-based scheduling algorithm that minimizes disruptions to lower-priority tasks. This algorithm sorts tasks based on their priority and calculates waiting and turnaround times for each process. Additionally, it applies a "ripple effect" adjustment to reduce the waiting time of lower-priority tasks.
+
+## Table of Contents
+
+1. [Overview](#overview)
+2. [Algorithm Details](#algorithm-details)
+3. [Code Structure](#code-structure)
+4. [How to Use](#how-to-use)
+5. [Sample Input/Output](#sample-inputoutput)
+
+## Overview
+
+The Ripple Effect Scheduling (RES) algorithm is a **priority-based CPU scheduling algorithm** that aims to:
+- Prioritize tasks based on their priority level (where a lower priority number indicates higher priority).
+- Minimize disruptions to lower-priority tasks using a "ripple effect" adjustment, where each process slightly adjusts the waiting time of the next lower-priority process.
+
+This approach ensures that high-priority tasks are executed first but avoids causing excessive delays for lower-priority tasks.
+
+## Algorithm Details
+
+The algorithm involves the following steps:
+
+1. **Sorting by Priority**: Processes are sorted by priority (ascending order), where a lower priority number indicates a higher priority.
+2. **Waiting Time Calculation**:
+   - For each process, calculate the waiting time as the cumulative burst time of previous processes.
+   - Apply the "ripple effect" by reducing the waiting time of the next process slightly if it has a lower priority, ensuring it doesn't fall below zero.
+3. **Turnaround Time Calculation**:
+   - For each process, calculate the turnaround time as the sum of waiting time and burst time.
+4. **Average Waiting and Turnaround Times**: Display the average waiting and turnaround times for all processes.
+
+## Code Structure
+
+- **`Process` struct**: Stores the details for each process, including `id`, `priority`, `burstTime`, `waitingTime`, and `turnaroundTime`.
+- **`rippleEffectScheduling()`**: Sorts processes by priority and calculates waiting and turnaround times, applying the ripple effect.
+- **`printProcesses()`**: Displays the process details in a tabular format and calculates average waiting and turnaround times.
+- **`main()`**: Collects user input for each process and invokes the scheduling functions.
+
+## How to Use
+
+1. Clone or download this repository to your local machine.
+2. Compile the code using a C compiler (instructions below).
+3. Run the executable and input the number of processes.
+4. For each process, enter the priority and burst time when prompted.
+
+The output will display the waiting time and turnaround time for each process, along with the average waiting and turnaround times.
+
+## Sample Input/Output
+
+### Sample Input
+
+Enter number of processes: 3
+Enter priority and burst time for process 1: 1 5
+Enter priority and burst time for process 2: 2 8
+Enter priority and burst time for process 3: 1 2
+
+### Sample Output
+
+ID      Priority    Burst Time      Waiting Time    Turnaround Time
+1       1           5               0               5
+3       1           2               5               7
+2       2           8               4               12
+
+Average Waiting Time: 3.00
+Average Turnaround Time: 8.00