package class3_3_Loop_start; // Josiah Yoder, MSOE, 21 September 2015

import java.util.Scanner;

public class CircleDecisions {
    public static void main(String[] args) {
        //final double PI = 3.141592;
        Scanner in = new Scanner(System.in);

        System.out.println("Please enter the radius of a circle");
        double radius = in.nextDouble();

        System.out.print("What do you want to do?");
        System.out.print("To compute the area of the circle, enter \"a\".\n" +
                         "Or, enter \"c\" for circumference: ");

        String line = in.nextLine();
        char c = line.charAt(0);

        if(c=='a') {
            double area = Math.PI * radius * radius;
            System.out.println("The area is: "+area);
        } else if(c=='c') {
            double circumference = 2 * Math.PI * radius;
            System.out.println("The circumference is: "+circumference);
        } else {
            System.out.println("Unexpected command: "+c+" Please enter \"a\" or \"c\" next time.");
        }
        System.out.println("Thank you for using this program.");

    }
}