FRQ 2022 Q2

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Overview

In this article, we will delve into the implementation of a game spinner in Java, specifically focusing on the requirements outlined in the FRQ 2022 Q2. The game spinner is a simple class that simulates a spinning wheel with a specified number of sectors. The class includes methods to spin the wheel, return the length of the current run of identical results, and handle edge cases.

The GameSpinner Class

The GameSpinner class is designed to meet the requirements outlined in the FRQ 2022 Q2. The class has three instance variables: sectors, lastSpin, and currentRunLength. The sectors variable represents the number of sectors on the spinner, lastSpin stores the result of the most recent spin, and currentRunLength keeps track of the length of the current run of identical results.

Constructor

The constructor of the GameSpinner class takes an integer parameter numSectors, which represents the number of sectors on the spinner. The constructor initializes the sectors variable with the specified number of sectors, sets lastSpin to -1 to indicate that no spins have occurred yet, and sets currentRunLength to 0.

public GameSpinner(int numSectors) {
    sectors = numSectors;
    lastSpin = -1;  // Initialize to -1 to indicate no spins yet
    currentRunLength = 0;
}

Spin Method

The spin() method simulates a spin of the wheel and returns a random integer between 1 and the number of sectors. The method uses the Math.random() function to generate a random number between 0 and 1, multiplies it by the number of sectors, and adds 1 to get a random integer between 1 and the number of sectors.

public int spin() {
    // Generate a random number between 1 and sectors
    int result = (int)(Math.random() * sectors) + 1;
    
    // Check if this is the first spin or if the result matches the last spin
    if (lastSpin == -1) {
        // First spin
        currentRunLength = 1;
    } else if (result == lastSpin) {
        // Result matches the last spin, increment the run length
        currentRunLength++;
    } else {
        // Result differs from the last spin, reset the run length
        currentRunLength = 1;
    }
    
    // Update the last spin
    lastSpin = result;
    
    return result;
}

CurrentRun Method

The currentRun() method returns the length of the current run of identical results. This method is used to get the number of consecutive spins that are the same as the most recent spin.

public int currentRun() {
    return currentRunLength;
}

Handling Edge Cases

The GameSpinner class handles the following edge cases:

  • First Spin: When the first spin occurs, the currentRunLength is set to 1.
  • Matching Result: If the result of the spin matches the last spin, the currentRunLength is incremented by 1.
  • Non-Matching Result: If the result of the spin does not match the last spin, currentRunLength is reset to 1.

Example Usage

Here's an example of how to use the GameSpinner class:

public class Main {
    public static void main(String[] args) {
        GameSpinner spinner = new GameSpinner(10);
        
        for (int i = 0; i < 10; i++) {
            int result = spinner.spin();
            System.out.println("Spin " + (i + 1) + ": " + result);
            System.out.println("Current Run Length: " + spinner.currentRun());
            System.out.println();
        }
    }
}

This example creates a GameSpinner object with 10 sectors and simulates 10 spins. After each spin, it prints the result and the current run length.

Conclusion

In this article, we implemented a game spinner in Java that meets the requirements outlined in the FRQ 2022 Q2. The GameSpinner class includes a constructor, a spin() method, and a currentRun() method to handle edge cases and provide a simple way to simulate a spinning wheel. The example usage demonstrates how to use the GameSpinner class to simulate multiple spins and print the results and current run lengths.

Overview

In this article, we will provide a Q&A section to further clarify the implementation of the GameSpinner class in Java. The GameSpinner class is a simple class that simulates a spinning wheel with a specified number of sectors. The class includes methods to spin the wheel, return the length of the current run of identical results, and handle edge cases.

Q&A

Q: What is the purpose of the GameSpinner class?

A: The GameSpinner class is designed to simulate a spinning wheel with a specified number of sectors. It provides methods to spin the wheel, return the length of the current run of identical results, and handle edge cases.

Q: What is the constructor of the GameSpinner class used for?

A: The constructor of the GameSpinner class is used to initialize the instance variables of the class, including the number of sectors, the last spin result, and the current run length.

Q: How does the spin() method work?

A: The spin() method generates a random integer between 1 and the number of sectors, checks if this is the first spin or if the result matches the last spin, and updates the last spin result and the current run length accordingly.

Q: What is the purpose of the currentRun() method?

A: The currentRun() method returns the length of the current run of identical results.

Q: How does the GameSpinner class handle edge cases?

A: The GameSpinner class handles the following edge cases:

  • First Spin: When the first spin occurs, the currentRunLength is set to 1.
  • Matching Result: If the result of the spin matches the last spin, the currentRunLength is incremented by 1.
  • Non-Matching Result: If the result of the spin does not match the last spin, currentRunLength is reset to 1.

Q: Can you provide an example of how to use the GameSpinner class?

A: Yes, here's an example of how to use the GameSpinner class:

public class Main {
    public static void main(String[] args) {
        GameSpinner spinner = new GameSpinner(10);
        
        for (int i = 0; i < 10; i++) {
            int result = spinner.spin();
            System.out.println("Spin " + (i + 1) + ": " + result);
            System.out.println("Current Run Length: " + spinner.currentRun());
            System.out.println();
        }
    }
}

This example creates a GameSpinner object with 10 sectors and simulates 10 spins. After each spin, it prints the result and the current run length.

Q: What are the benefits of using the GameSpinner class?

A: The GameSpinner class provides a simple and efficient way to simulate a spinning wheel with a specified number of sectors. It handles edge cases and provides a clear and concise implementation.

Q: Can the GameSpinner class be used in real-world applications?

A: Yes, the GameSpinner class can be used in real-world applications where a spinning wheel is simulated, such as in games, simulations, or other applications where a random outcome is required.

Conclusion

In this article, we provided a Q&A section to further clarify the implementation of the GameSpinner in Java. The GameSpinner class is a simple class that simulates a spinning wheel with a specified number of sectors. It provides methods to spin the wheel, return the length of the current run of identical results, and handle edge cases. The example usage demonstrates how to use the GameSpinner class to simulate multiple spins and print the results and current run lengths.