Add files via upload

Author: Sofiyan-coder

TASK_1.java

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+import java.util.*;
+
+class Authentication{
+    static HashMap<String,String> login = new HashMap<String,String>();
+    static Scanner in = new Scanner(System.in);
+    List<Integer> Pnr_no = new ArrayList<Integer>();
+    Dictionary trainList = new Hashtable();
+  // Dictionary passgr_detail = new Hashtable();
+    HashMap<String,String[]> passengers = new HashMap<String,String[]>();
+    Dictionary<Integer, String> passgr_detail = new Hashtable<Integer, String>();
+
+    public  static void Start()
+    {}
+        
+
+     void Sign_up() {
+      
+        String username,password;
+        System.out.println("Enter Username");
+        username=in.nextLine();
+        System.out.println("Enter Password");
+        password=in.nextLine();
+        login.put(username,password);
+        
+    }
+
+    void Sign_in() {
+        String inusername,inpassword;
+        int ch;
+        Scanner in = new Scanner(System.in);
+        System.out.println("Enter Username");
+        inusername=in.nextLine();
+        System.out.println("Enter Password");
+        inpassword=in.nextLine();
+
+        
+        //Check whether entered password with username
+        if (inpassword.equals(login.get(inusername))){
+            options();
+
+        }
+        else
+        {
+            System.out.println("Password invalid");
+        }
+    }
+
+    public void options() {
+        System.out.println("1.Reservation Details");
+        System.out.println("2.Cancellation");
+        System.out.println("Enter Choice");
+         int ch = in.nextInt();
+
+        switch (ch){
+
+            case 1:
+                Reservation_sys();
+                break;
+
+            case 2:
+                cancellation();
+                break;
+
+            default:
+                System.out.println("Enter Valid Choice");
+
+        }
+
+    }
+
+    public void cancellation() {
+        Integer PNR_no;
+        System.out.println("Enter PNR Number");
+        PNR_no = in.nextInt();
+
+
+                System.out.println("Details" + passgr_detail.get(trainList));
+                System.out.println("\n");
+
+
+
+        options();
+
+    }
+
+    public void Reservation_sys() {
+        Scanner in =new Scanner(System.in);
+
+
+        trainList.put("10022","LTT");
+        trainList.put("10023","Pudocherry Express");
+        trainList.put("10024","Chennai Express");
+        String train_no;
+        String class_type,date,from_place,to_place;
+
+        int n =trainList.size();
+        for (int i = 0; i < n; i++) {
+
+
+            System.out.println("Enter Train Number");
+            System.out.println("10022\n" + "10023\n" + "10024\n");
+            train_no = in.nextLine();
+            passgr_detail.put(1, train_no);
+            //passgr_detail.put((String) trainList.get(train_no));
+            System.out.println("Train Name is :" + trainList.get(train_no));
+            System.out.println("Enter Class type ");
+            class_type = in.nextLine();
+            passgr_detail.put(1,class_type);
+            System.out.println("Enter Date of Journey");
+            date = in.nextLine();
+            passgr_detail.put(1, date);
+            System.out.println("Enter From place :");
+            from_place = in.nextLine();
+            passgr_detail.put(1,from_place);
+            System.out.println("Enter Destination place");
+            to_place = in.nextLine();
+            passgr_detail.put(1,to_place);
+            System.out.println("Enter insert");
+            String insert = in.nextLine();
+            options();
+
+        }
+
+
+
+
+    }
+}
+
+public class TASK_1 {
+    public static void main(String[] args) {
+         Scanner in = new Scanner(System.in);
+        Authentication obj = new Authentication();
+        do {
+            System.out.println("1.Sign In");
+            System.out.println("2.Sign Up");
+            System.out.println("Enter Choice");
+            int ch = in.nextInt();
+            switch (ch) {
+                case 1 -> obj.Sign_in();
+                case 2 -> obj.Sign_up();
+                default -> System.out.println("Enter valid choice");
+            }
+        }while (true);
+    }
+
+
+
+}
+

TASK_2.java

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+import java.util.Scanner;
+
+public class TASK_2 {
+
+        // Function that implements the
+        // number guessing game
+        public static void numberGuessingGame()
+        {
+            // Scanner Class
+            Scanner sc = new Scanner(System.in);
+
+            // Generate the numbers
+            int number = 1 + (int)(100 * Math.random());
+
+            // Given K trials
+            int K = 5;
+
+            int i, guess;
+
+            System.out.println("A number is chosen between 1 to 100."
+                            + "Guess the number within 5 trials.");
+
+
+            for (i = 0; i < K; i++) {
+
+                System.out.println(
+                        "Guess the number:");
+
+                // Take input for guessing
+                guess = sc.nextInt();
+
+                // If the number is guessed
+                if (number == guess) {
+                    System.out.println(
+                            "Congratulations!"
+                                    + " You guessed the number.");
+                    break;
+                }
+                else if (number > guess && i != K - 1) {
+                    System.out.println("The number is greater than " + guess);
+                }
+                else if (number < guess && i != K - 1) {
+                    System.out.println("The number is less than " + guess);
+                }
+            }
+
+            if (i == K) {
+                System.out.println("You have exhausted " + K +" trials.");
+
+                System.out.println("The number was " + number);
+            }
+        }
+
+
+        public static void main(String arg[])
+        {
+
+
+            numberGuessingGame();
+        }
+}
+