Add Ex05_34

Author: jsquared21

Exercise_05/Exercise_05_34_1/Exercise_05_34.class

@@ -0,0 +1,72 @@
+/*
+(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.
+*/
+import java.util.Scanner;
+
+public class Exercise_05_34 {
+	public static void main(String[] args) {
+		Scanner input = new Scanner(System.in);
+
+		int computerWins,					// Counts he number of computer Wins
+			 userWins;						// Counts the number of users Wins
+		computerWins = userWins = 0; 	// Set acummulators to 0
+
+		do {
+			// Generate a random integer 0, 1, or 2
+			int computer = (int)(Math.random() * 3);
+	
+			// Prompt the user to enter a number 0, 1, or 2
+			System.out.print("scissor (0), rock(1), paper (2): ");
+			int user = input.nextInt();
+	
+			System.out.print("The computer is ");
+			switch (computer)
+			{
+				case 0: System.out.print("scissor."); break;
+				case 1: System.out.print("rock."); break;
+				case 2: System.out.print("paper."); break;
+			}
+	
+			System.out.print(" You are ");
+			switch (user)
+			{
+				case 0: System.out.print("scissor"); break;
+				case 1: System.out.print("rock"); break;
+				case 2: System.out.print("paper"); break;
+				default : System.out.println(
+					"disqualified for entering an invalid number.");
+					System.exit(1);
+			}
+	
+			// Display result 
+			if (computer == user)
+				System.out.println(" too, It is a draw");
+			else
+			{
+				boolean win = (user == 0 && computer == 2) ||
+								  (user == 1 && computer == 0) ||
+								  (user == 2 && computer == 1);
+				if (win)
+				{
+					System.out.println(". You won");
+					computerWins++; // Increment computer wins
+				}
+				else
+				{
+					System.out.println(". You lose");
+					userWins++;		// Increment user wins
+				}
+				
+			}
+			// Print Score
+			System.out.println("Computer wins: " + computerWins +
+				"\nUser wins: " + userWins);
+
+			// If either the user or the computer wins  
+			// are less than or equal to 2 continue play.
+		} while (Math.abs(computerWins - userWins) <= 2);
+	}
+}