/** 10/17/2018 */

import java.util.Scanner;

public class Travel {
  /** This is Question 5 on the sample exam    */
  public static void main(String[]  args) {
  Scanner sc = new Scanner(System.in);
  final double DISCOUNT_RATE = .075;
  int idnum, miles; 
  double ppM;  // only on the exam u can use short var names
  int trips=0, noDiscount=0;
  System.out.println("Enter idnum and miles: ");
  // reading until end of input (user type ^D)
  while(sc.hasNext()) {
    // 1. Read in
     idnum = sc.nextInt();
     System.out.println("Enter number of miles: ");
     miles = sc.nextInt();
     System.out.println("Enter price per mile: ");
     ppM = sc.nextDouble();
     System.out.println("Trip " + idnum + " travelled " + miles 
                          + " miles, price per mile is: " + ppM);
    // 2. Compute Base Price
     double basePrice = miles * ppM;
     System.out.println("Base price is: " + basePrice);
     
    // 3. Compute discount
     double discount=0;
     if (miles>=20) {
       discount = DISCOUNT_RATE * basePrice;
       System.out.println("You get a discount of " + discount);
     }
     else {
       System.out.println("You do not get a discount.");
       noDiscount++;
     }
     
    // 4. Determine final price
     double finalPrice = basePrice - discount;
     System.out.println("Final price is: " +finalPrice+
                        " Discount is: " + discount);
     trips++; // incr counter
     // structured read loop
     System.out.println("Enter id number of next trip (^D to exit): ");
  } // 5. loop
  
  // 6. Print totals
  System.out.println("Number of trips is: " + trips + 
                     "\nNo discount is: " + noDiscount);
 }
}