CODEWITHSUNDEEP
java
S.Yama
S.Yama

Reputation: 1

Circle calculator with errors

Decimal format is not working, but believed to be typed up correctly calculation for area isn't working keeps giving me 0.0 circumference works. I need help getting it to skip entering radius when they enter an invalid or option. Please help. Attached is the program:

import java.text.DecimalFormat;
import java.util.Scanner;``

public class Calculator {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        DecimalFormat formatter = new DecimalFormat("#00.0000");

        String choice;
        int option;
        double area;
        double circumference;
        double radius; 

        area = 0;
        circumference = 0;     
        option = keyboard.nextInt();
        radius = keyboard.nextDouble();

        System.out.println("CIRCLE CALCULATOR MENU");

        System.out.println("1) Calculate the Area of a Circle");
        if (option == 1) {
            area = (radius*radius)*Math.PI;
        }

        System.out.println("2) Calculate the Circumference of a Circle");
        if  (option == 2) {
            circumference = 2*radius*Math.PI;
        }

        System.out.println("3) Quit the Program");                          
        System.out.println("");
        System.out.println("Make a selection by choosing a number: ");
        if (1 == option || 2 == option)
            System.out.println("Please enter the radius of the circle: ");
        if (1 == option) {
            System.out.println("The area of the circle with radius "+radius+" is: " + circumference + "");
        }else if (2 == option) {
            System.out.println("The circumference of the circle with radius         "+radius+" is: " + circumference + "");
        } else if (option == 3) {
            System.out.println("You have chosen to quit the program");
        } else if (option > 4) {
            System.out.println("You have made an invalid selection.");
        }
    }
}

Upvotes: 0

Views: 117

Answers (2)

Rahman
Rahman

Reputation: 3785

You have rearrange your code. Its not in proper order:

Try this :

while(true) {
            Scanner sc = new Scanner(System.in);
            System.out.print("Please enter your option 1.Area 2.Circumference 3.Quit");
            int choice = sc.nextInt();
            double area = 0,circumference =0, radius=0;
            switch (choice) {
            case 1:
                System.out.print("PLease enter the radius :");
                radius = sc.nextInt();
                area =(radius*radius)*Math.PI;
                System.out.print("Area : " +area);
                continue;
            case 2:
                System.out.print("PLease enter the radius :");
                radius = sc.nextInt();
                circumference = 2*radius*Math.PI;
                System.out.print("circumference : " +circumference);
                continue;
            case 3:
                break;

            default:
                System.out.print("Enter a valid option");
            }
        }

Upvotes: 0

Bon
Bon

Reputation: 3103

You are printing the value of circumference when you actually want to print the value of area:

System.out.println("The area of the circle with radius " + radius + " is: " + circumference + "");

Change circumference to area in the above statement will solve the problem.

Upvotes: 1

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