//Tip based on service
package mealcost;
import java.util.*;
public class CalculateTip {
  public static void main(String[] args) {
    Scanner keyboard=new Scanner(System.in); //do just once
    double cost, tip;
    String service;
    System.out.print("Enter the cost of the meal: $");
    cost=keyboard.nextDouble();
    System.out.print("Was the service good (Y or N):");
    service=keyboard.next();
    switch(service) {
      case "Y": case "y": tip=cost*0.20; break;//20% for good service
      case "N": case "n": tip=cost*0.15; break;//15% for ok service
      default: System.out.println("not a valid answer"); tip=0.00; 
    }
    System.out.println(String.format("The tip should be $%.2f",tip));
  }//main
}//class