Question

Homework:

Write a sample program in Java to compute the number of chocolate spheres stacked in a triangular pyramid within x triangular layers. n(x) is the number of balls required to make x layers.

The value of x is entered by users.

(Try for x = 4, x =5.)

//Formula//

n(x) = 1/6 * x^3 + 1/2 * x^2 + 1/3 x

*Use Buffered Reader class and method readline();

*No if, no loops. Use Java, and be basic so I can understand your coding.

Answer 1

Thanks for the question, here is the java code with comments so that you can underatnd and learn.

Let me know if you need any help with any other java questions

thank you !

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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class BallPyramid {

   public static void main(String[] args) {

        // create a BufferedReader object to read user input that is the value of x
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Enter the number of layers: ");
        try {
            // read user input in the below line and convert to integer number
            int layers = Integer.parseInt(reader.readLine());
            // calculate the number of balls needed in the below line of code
           int ballsNeeded = (layers*layers*layers)/6 +(layers*layers)/2 + layers/3;
            // print the balls needed count
            System.out.println("Total Balls Required: "+ballsNeeded);


        } catch (IOException e) { // incase there are any errors reading the input
            System.out.println("Error: Input error");
        }

    }
}

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