finised exercise 34

Author: Jonathan-Birkey

src/com/github/jonathanbirkey/chapter03/Exercise17.java

@@ -31,6 +31,7 @@ public static void main(String[] args) {
         break;
       case 2:
         System.out.print("The computer is paper. ");
+        break;
       default:
         System.out.print("Invalide");
     }
@@ -43,6 +44,7 @@ public static void main(String[] args) {
         break;
       case 2:
         System.out.print("You are paper");
+        break;
       default:
         System.out.print("Invalide");
     }

src/com/github/jonathanbirkey/chapter05/Exercise34.java

@@ -2,14 +2,73 @@
  * @author : Jonathan Birkey
  * @mailto : [email protected]
  * @created : 28Feb2024
- *     <p>(Display leap years) Write a program that displays all the leap years, 10 per line, from
- *     101 to 2100, separated by exactly one space. Also display the number of leap years in this
- *     period.
+ *     <p>(Game: scissor, rock, paper) Programming Exercise 3.17 gives a program that plays the
+ *     scissor–rock–paper game. Revise the program to let the user continuously play until either
+ *     the user or the computer wins more than two times than its opponent.
  */
 package com.github.jonathanbirkey.chapter05;
 
+import java.util.Scanner;
+
 public class Exercise34 {
   public static void main(String[] args) {
-    // TODO: solve
+    Scanner input = new Scanner(System.in);
+    int computerWins = 0;
+    int userWins = 0;
+
+    while (computerWins < 2 && userWins < 2) {
+      int computerPick = (int) (Math.random() * 3);
+      System.out.print("scissor (0), rock (1), paper (2): ");
+      int userPick = input.nextInt();
+      switch (computerPick) {
+        case 0:
+          System.out.print("The computer is scissor. ");
+          break;
+        case 1:
+          System.out.print("The computer is rock. ");
+          break;
+        case 2:
+          System.out.print("The computer is paper. ");
+          break;
+        default:
+          System.out.print("Invalide");
+      }
+      switch (userPick) {
+        case 0:
+          System.out.print("You are scissor");
+          break;
+        case 1:
+          System.out.print("You are rock");
+          break;
+        case 2:
+          System.out.print("You are paper");
+          break;
+        default:
+          System.out.print("Invalide");
+      }
+      if (computerPick == userPick) {
+        System.out.println(" too. It is a draw");
+      } else if (computerPick == 0 && userPick == 1) {
+        System.out.println(". You won\n");
+        userWins++;
+      } else if (computerPick == 1 && userPick == 2) {
+        System.out.println(". You won\n");
+        userWins++;
+      } else if (computerPick == 2 && userPick == 0) {
+        System.out.println(". You won\n");
+        userWins++;
+      } else if (computerPick == 0 && userPick == 2) {
+        System.out.println(". You lost\n");
+        computerWins++;
+      } else if (computerPick == 1 && userPick == 0) {
+        System.out.println(". You lost\n");
+        computerWins++;
+      } else if (computerPick == 2 && userPick == 1) {
+        System.out.println(". You lost\n");
+        computerWins++;
+      }
+    }
+    input.close();
+    System.out.printf("\nFinal score\nComputer: %d\tUser: %d", computerWins, userWins);
   }
 }