Question

16.Write a menu driven program to find the following. Area of a circle ,Area of a rectangle ,Area of a square.

Answer 1

Answer:

I hope this will help you

Answer 2

Answer:

import java.util.Scanner;

public class KboatMenuArea

{

   public static void main(String args[]) {

       

       Scanner in = new Scanner(System.in);

       

       System.out.println("Enter c to calculate area of circle");

       System.out.println("Enter s to calculate area of square");

       System.out.println("Enter r to calculate area of rectangle");

       System.out.print("Enter your choice: ");

       char choice = in.next().charAt(0);

       

       switch(choice) {

           case 'c':

               System.out.print("Enter radius of circle: ");

               double r = in.nextDouble();

               double ca = (22 / 7.0) * r * r;

               System.out.println("Area of circle = " + ca);

               break;

               

           case 's':

               System.out.print("Enter side of square: ");

               double side = in.nextDouble();

               double sa = side * side;

               System.out.println("Area of square = " + sa);

               break;

               

           case 'r':

               System.out.print("Enter length of rectangle: ");

               double l = in.nextDouble();

               System.out.print("Enter breadth of rectangle: ");

               double b = in.nextDouble();

               double ra = l * b;

               System.out.println("Area of rectangle = " + ra);

               break;

               

           default:

               System.out.println("Wrong choice!");

       }

   }

}