Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
5th Edition
ISBN: 9780134801155
Author: Tony Gaddis
Publisher: PEARSON
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Expert Solution & Answer
Chapter 5.5, Problem 5.24CP
Explanation of Solution
Sentinel:
Sentinel is the special value which is used to stop the sequence of series when there is no indication of explicit size.
- It is also called as “flag value” or “dummy value” created in the
algorithm to terminate theprogram . - The sentinel value must be a distinct value from the other data values, so that it is guaranteed to end the data.
- For example: “null character” is used to end the null terminated string and a “negative integer” is used to indicate the end of sequence for non-negative integers.
- Whenever the program reads the sentinel value it stops the execution of loop, because it knows that it reaches the end of sequence.
Example Program:
The following program code uses the sentinel value:
#Initialize the variables
total = 0
counter = 0
# Get the marks
...Expert Solution & Answer
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Add a timer in the following code.
public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon; private Timer timer; private long elapsedTime;
public GameGUI(Labyrinth labyrinth, Player player, Dragon dragon) { this.labyrinth = labyrinth; this.player = player; this.dragon = dragon; String playerName = JOptionPane.showInputDialog("Enter your name:"); player.setName(playerName); elapsedTime = 0; timer = new Timer(1000, e -> { elapsedTime++; repaint(); }); timer.start();
}
@Override protected void paintComponent(Graphics g) { super.paintComponent(g); int cellSize = Math.min(getWidth() / labyrinth.getSize(), getHeight() / labyrinth.getSize());}
Change the following code so that when player wins the game, the game continues by creating new GameGUI with the same player. However the player's starting position is same, everything else should be reseted.
public static void main(String[] args) { Labyrinth labyrinth = new Labyrinth(10); Player player = new Player(9, 0); Random rand = new Random(); Dragon dragon = new Dragon(rand.nextInt(10), 9); JFrame frame = new JFrame("Labyrinth Game"); GameGUI gui = new GameGUI(labyrinth, player, dragon);
frame.setLayout(new BorderLayout()); frame.setSize(600, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(gui, BorderLayout.CENTER); frame.pack(); frame.setResizable(false); frame.setVisible(true); }
public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon; private Timer timer; private long…
Create a menu item which restarts the game. Also add a timer, which counts the elapsed time since the start of the game level.
When the restart is pressed, the restarted game should ask the player' name (in the GameGUI constructor) and set the score of player to 0 (player.setScore(0)), and the timer should restart again. And create a logic so that if the player loses his life (checkGame if the condition is false), then save this number together with his name into two variables. And display two buttons where one quits the game altogether (System.exit(0)) and the other restarts the game.
public class GameGUI extends JPanel { private final Labyrinth labyrinth; private final Player player; private final Dragon dragon;
private final ImageIcon playerIcon = new ImageIcon("data/images/player.png"); private final ImageIcon dragonIcon = new ImageIcon("data/images/dragon.png"); private final ImageIcon wallIcon = new ImageIcon("data/images/wall.png"); private final ImageIcon…
Chapter 5 Solutions
Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)
Ch. 5.1 - What is a repetition structure?Ch. 5.1 - What is a condition-controlled loop?Ch. 5.1 - What is a count-controlled loop?Ch. 5.2 - What is a loop iteration?Ch. 5.2 - What is the difference between a pretest loop and...Ch. 5.2 - Does the While loop test its condition before or...Ch. 5.2 - Does the Do-While loop test its condition before...Ch. 5.2 - What is an infinite loop?Ch. 5.2 - What is the difference between a Do-While loop and...Ch. 5.3 - What is a counter variable?
Ch. 5.3 - What three actions do count-controlled loops...Ch. 5.3 - When you increment a variable, what are you doing?...Ch. 5.3 - Look at the following pseudocode. If it were a...Ch. 5.3 - Prob. 5.14CPCh. 5.3 - Look at the following pseudocode. If it were a...Ch. 5.3 - Look at the following pseudocode. If it were a...Ch. 5.3 - Look at the following pseudocode. If it were a...Ch. 5.3 - Look at the following pseudocode. If it were a...Ch. 5.4 - A program that calculates the total of a series of...Ch. 5.4 - Prob. 5.20CPCh. 5.4 - Should an accumulator be initialized to any...Ch. 5.4 - Look at the following pseudocode. If it were a...Ch. 5.4 - Look at the following pseudocode. If it were a...Ch. 5.5 - Prob. 5.24CPCh. 5.5 - Why should you take care to choose a unique value...Ch. 5 - A ______ controlled loop uses a true/false...Ch. 5 - A ______ controlled loop repeats a specific number...Ch. 5 - Each repetition of a loop is known as a(n) ______....Ch. 5 - The Whi1e loop is a ______ type of loop. a....Ch. 5 - The Do-Whi1e loop is a ______ type of loop. a....Ch. 5 - The For loop is a ______ type of loop. a. pretest...Ch. 5 - A(n) ______ loop has no way of ending and repeats...Ch. 5 - A _______ loop always executes at least once. a....Ch. 5 - Prob. 9MCCh. 5 - A(n) ______ is a special value that signals when...Ch. 5 - A condition-controlled loop always repeats a...Ch. 5 - The While loop is a pretest loop.Ch. 5 - The Do-While loop is a pretest loop.Ch. 5 - You should not write code that modifies the...Ch. 5 - You cannot display the contents of the counter...Ch. 5 - Prob. 6TFCh. 5 - The following statement decrements the variable x:...Ch. 5 - It is not necessary to initialize accumulator...Ch. 5 - In a nested loop, the inner loop goes through all...Ch. 5 - To calculate the total number of iterations of a...Ch. 5 - Why should you indent the statements in the body...Ch. 5 - Describe the difference between pretest loops and...Ch. 5 - What is a condition-controlled loop?Ch. 5 - What is a count-controlled loop?Ch. 5 - What three actions do count-controlled loops...Ch. 5 - What is an infinite loop? Write the code for an...Ch. 5 - A For loop looks like what other loop in a...Ch. 5 - Why is it critical that accumulator variables are...Ch. 5 - What is the advantage of using a sentinel?Ch. 5 - Prob. 10SACh. 5 - Design a Whi1e loop that lets the user enter a...Ch. 5 - Design a Do-Whi1e loop that asks the user to enter...Ch. 5 - Design a For loop that displays the following set...Ch. 5 - Design a loop that asks the user to enter a...Ch. 5 - Design a For loop that calculates the total of the...Ch. 5 - Design a nested loop that displays 10 rows of #...Ch. 5 - Convert the Whi1e loop in the following code to a...Ch. 5 - Convert the Do-Whi1e loop in the following code to...Ch. 5 - Convert the following Whi1e loop to a For loop:...Ch. 5 - Convert the following For loop to a Whi1e loop:...Ch. 5 - Find the error in the following pseudocode....Ch. 5 - The programmer intended the following pseudocode...Ch. 5 - The programmer intended the following pseudocode...Ch. 5 - Bug Collector A bug collector collects bugs every...Ch. 5 - Calories Burned Running on a particular treadmill...Ch. 5 - Budget Analysis Design a program that asks the...Ch. 5 - Sum of Numbers Design a program with a loop that...Ch. 5 - Tuition Increase At one college, the tuition for a...Ch. 5 - Distance Traveled The distance a vehicle travels...Ch. 5 - Average Rainfall Design a program that uses nested...Ch. 5 - Celsius to Fahrenheit Table Design a program that...Ch. 5 - Pennies for Pay Design a program that calculates...Ch. 5 - Largest and Smallest Design a program with a loop...Ch. 5 - First and Last Design a program that asks the user...Ch. 5 - Calculating the Factorial of a Number In...Ch. 5 - Multiplication Table Design a program that uses...
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