/** CISC 1115 HW #2 
  * Calculates shipping costs
  */
import java.util.Scanner;

public class HW2
{
 public static void main(String[]  args)
 {
   Scanner scan = new Scanner(System.in);
   
   System.out.print("Enter package weight in pounds: ");  // ask for weight
   double weight = scan.nextDouble();
  
   System.out.print("Enter shipping distance in miles: "); // ask for distance
   double dist = scan.nextDouble();
   dist = Math.ceil(dist/400);    // rounds up the decimal after dividing by 400
  
   if (weight>=0) // must be a positive amount
   {
    System.out.print("The shipping cost for your package is: $");
    double rate;
    
    if (weight<=2)  // 2 or less pounds
     rate = 1.59;
    else if (weight <= 5)  // between 2 and 5 pounds
     rate = 3.10;
    else if (weight <= 9)  // between 5 and 9 pounds
     rate = 4.25;
    else 
     rate = 5.00;  // over 9 pounds
   
    double cost = rate * dist; // formula to calculate cost of delivering package
   
    System.out.printf("%.2f is the cost, based upon the base cost of $%.2f"
                     + " per 400 miles.", cost,rate); // 2 decimal places 
   }
   
   else 
     System.out.println("Error. Your number is negative.");  // if number is less than 0
 }
}

/** Handcheck:
  * -5 pounds for 100 miles = error
  * 1 pound for 200 miles = $1.59
  * 3.5 pounds for 900 miles = $9.30
  * 7.8 pounds for 1725.5 miles = $21.25
  * 11 pounds for 2000 miles = $25.00
  * All the calculations are correect when the program was ran
  * */

/** Memory Trace
  * Weight | Dist | Rate | Cost
  *   -5   | 100  |   0  |  0
  *   -5   |  1   |   0  |  0
  *   1    | 200  | 1.59 |  0
  *   1    |  1   | 1.59 | 1.59
  *  3.5   | 900  | 3.1  |  0
  *  3.5   |  3   | 3.1  | 9.3
  * */