import java.util.Scanner;
import java.util.*;

/** 
 * This class is written for a Carpet Company to calculate the
 * price of a carpet for a room.
 */
public class CarpetCo {
  /**
   * Give user a choice of carpets and get price
   * Read in length and width of room
   * Calculate area (making sure to round up the numbers)
   * Calculate price
   */
  public static void main(String[] args)   {
    Scanner keyboard = new Scanner(System.in);
    double pricePerSqFt = chooseType(keyboard);
    if (pricePerSqFt==-1)
        System.exit(1);
    
    System.out.println("Price per square foot is: " + pricePerSqFt);
    double length = readDouble("length", keyboard);
    double width = readDouble("width", keyboard);
    
    int area = area((int)Math.ceil(length), (int)Math.ceil(width));
    
    System.out.println("length: " + length + " width: " + width +
                       " area: " + area + " price: $" 
                       + calculatePrice(area, pricePerSqFt));
  } 
  /**
   * This method prints a menu of different carpet choices.
   * @param Scanner object to read choice
   * @return price per square foot of the user's choice of carpet
   */
  public static double chooseType (Scanner sc)   {
    // menu
    System.out.printf("1. $5.00 per sq ft\n2. $7.00 per sq ft\n3."
                        + "$10.00 per sq ft.\nEnter choice (1-3): ");
    // validate input... next version
    switch (sc.nextInt()) {
      case 1: return 5.0;
      case 2: return 7.00;
      case 3: return 10.0;
      default:
              System.out.println("Your choice is not valid!");
    }
    return -1;
  }
  /**
   */
  public static double readDouble(String prompt, Scanner sc) {
    System.out.print("Enter the " + prompt + ":");
    // d is a local variable
    double d = sc.nextDouble();
    return d;
  }
  /**
   */
  public static int area(int w, int len) {
    return w*len;
  }
    /** 
     * calculatePrice calculates and returns price to carpet a room
     * @param area is the rounded area of the room as an int
     * @param price is the price per square foot of the carpte
     * @return the total price for the room
     */
   public static double calculatePrice(int area, double price) {
     return area*price;
   }
}

/**LAB10:  Write a method that accepts a temperature in degrees
  * Celcius and returns the degrees Faranheit.
  * Test the method by reading in several values in main (hint: use 
  * a loop) and calling and printing the return value.
  * NOTE: all reading and printing should be done in main.
  */