Merge pull request 'wh2' (#2) from main into develop

Reviewed-on: Razia/WS-02-intro-to-oop#2

src/CourseRegistrationStarter/Course.java

@@ -1,27 +1,19 @@
 package CourseRegistrationStarter;
 
 public class Course {
-    private String courseName;
-    private String courseCode;
+    private String name;
+    private String code;
     private int capacity;
 
-    public Course(String courseName, String courseCode, int capacity) {
-        this.courseName = courseName;
-        this.courseCode = courseCode;
+    public Course(String name, String code, int capacity) {
+        this.name = name;
+        this.code = code;
         this.capacity = capacity;
     }
 
-    public String getCourseName() {
-        return courseName;
-    }
-
-    public String getCourseCode() {
-        return courseCode;
-    }
-
-    public int getCapacity() {
-        return capacity;
-    }
+    public String getName() { return name; }
+    public String getCode() { return code; }
+    public int getCapacity() { return capacity; }
 
     public boolean reduceCapacity() {
         if (capacity > 0) {

src/CourseRegistrationStarter/Main.java

@@ -1,14 +1,61 @@
 package CourseRegistrationStarter;
 
+import java.util.Scanner;
+
 public class Main {
     public static void main(String[] args) {
-        // TODO:
-        // 1. Create at least 3 courses
-        // 2. Create 1 student
-        // 3. Create a registration system
-        // 4. Add courses to the system
-        // 5. Register the student in some courses
-        // 6. Drop one course
-        // 7. Print the final registered course list
+        Scanner scanner = new Scanner(System.in);
+        RegistrationSystem system = new RegistrationSystem();
+
+
+        system.addCourseToSystem(new Course("Advanced Programming", "CS101", 30));
+        system.addCourseToSystem(new Course("Data Structures", "CS102", 25));
+        system.addCourseToSystem(new Course("Database Systems", "CS103", 20));
+
+
+        System.out.print("Enter Student Name: ");
+        String sName = scanner.nextLine();
+        System.out.print("Enter Student ID: ");
+        String sId = scanner.nextLine();
+        Student student = new Student(sName, sId);
+
+        boolean running = true;
+        while (running) {
+            System.out.println("\n1. View All Courses\n2. Add Course\n3. Drop Course\n4. My Courses\n5. Exit");
+            System.out.print("Choice: ");
+            String choice = scanner.nextLine();
+
+            switch (choice) {
+                case "1":
+                    system.showAllCourses();
+                    break;
+                case "2":
+                    System.out.print("Enter course code to add: ");
+                    String addCode = scanner.nextLine();
+                    Course toAdd = system.findCourseByCode(addCode);
+                    if (toAdd != null) {
+                        if (student.addCourse(toAdd)) System.out.println("Successfully added.");
+                    } else {
+                        System.out.println("Course not found!");
+                    }
+                    break;
+                case "3":
+                    System.out.print("Enter course code to drop: ");
+                    String dropCode = scanner.nextLine();
+                    if (student.dropCourse(dropCode)) System.out.println("Successfully dropped.");
+                    else System.out.println("You are not registered in this course.");
+                    break;
+                case "4":
+                    student.showRegisteredCourses();
+                    break;
+                case "5":
+                    running = false;
+                    System.out.println("Exiting...");
+                    break;
+                default:
+                    System.out.println("Invalid option.");
+            }
+        }
+        scanner.close();
     }
 }

src/CourseRegistrationStarter/RegistrationSystem.java

@@ -1,24 +1,29 @@
 package CourseRegistrationStarter;
+
 import java.util.ArrayList;
 
 public class RegistrationSystem {
-    private ArrayList<Course> courses;
+    private ArrayList<Course> allCourses;
 
     public RegistrationSystem() {
-        courses = new ArrayList<>();
+        this.allCourses = new ArrayList<>();
     }
 
-    public void addCourseToSystem(Course c) {
-        // TODO: Add the course to the system
+    public void addCourseToSystem(Course course) {
+        allCourses.add(course);
     }
 
     public Course findCourseByCode(String code) {
-        // TODO: Search for a course by course code
-        // Return the matching course if found, otherwise return null
+        for (Course c : allCourses) {
+            if (c.getCode().equalsIgnoreCase(code)) return c;
+        }
         return null;
     }
 
     public void showAllCourses() {
-        // TODO: Print all courses in the system
+        System.out.println("\n--- Available Courses in System ---");
+        for (Course c : allCourses) {
+            System.out.println("Name: " + c.getName() + " | Code: " + c.getCode() + " | Capacity: " + c.getCapacity());
+        }
     }
 }

src/CourseRegistrationStarter/Student.java

@@ -1,39 +1,61 @@
 package CourseRegistrationStarter;
+
 import java.util.ArrayList;
 
 public class Student {
     private String name;
-    private String studentId;
+    private String id;
     private ArrayList<Course> registeredCourses;
+    private final int MAX_COURSES = 5;
 
-    public Student(String name, String studentId) {
+    public Student(String name, String id) {
         this.name = name;
-        this.studentId = studentId;
+        this.id = id;
         this.registeredCourses = new ArrayList<>();
     }
 
-    public String getName() {
-        return name;
-    }
+    public boolean addCourse(Course course) {
 
-    public String getStudentId() {
-        return studentId;
-    }
-
-    public boolean addCourse(Course c) {
-        // TODO: Register the student in the course if capacity allows
-        // Return true if registration was successful, otherwise false
+        if (registeredCourses.size() >= MAX_COURSES) {
+            System.out.println("Error: Maximum course limit reached (5).");
             return false;
         }
 
-    public boolean dropCourse(Course c) {
-        // TODO: Remove the course from the student's list
-        // Restore the course capacity if removal was successful
-        // Return true if the course was dropped, otherwise false
+        for (Course c : registeredCourses) {
+            if (c.getCode().equals(course.getCode())) {
+                System.out.println("Error: Already registered in " + course.getName());
+                return false;
+            }
+        }
+
+        if (course.reduceCapacity()) {
+            registeredCourses.add(course);
+            return true;
+        } else {
+            System.out.println("Error: No capacity left in " + course.getName());
+            return false;
+        }
+    }
+
+    public boolean dropCourse(String courseCode) {
+        for (Course c : registeredCourses) {
+            if (c.getCode().equals(courseCode)) {
+                c.increaseCapacity();
+                registeredCourses.remove(c);
+                return true;
+            }
+        }
         return false;
     }
 
     public void showRegisteredCourses() {
-        // TODO: Print all registered courses
+        System.out.println("\n--- Registered Courses for " + name + " (" + id + ") ---");
+        if (registeredCourses.isEmpty()) {
+            System.out.println("No courses registered yet.");
+        } else {
+            for (Course c : registeredCourses) {
+                System.out.println("- " + c.getName() + " [" + c.getCode() + "]");
+            }
+        }
     }
 }