문 공간을 계산하는 방법이 왜 아닌가요?

Question

내 방법에 문제가 있습니다. 그것은 항상 0.0의 값을 반환하므로 문 열림을 계산하지 않는 것 같습니다. 입력 된 길이와 높이를 기준으로 계산해야합니다. 감사합니다

package Hw; 

import java.util.Scanner; 

public class HouseReno3 { 

      public static void main(String[] args) { 

      // Initialize and Declare Variables 
      double ceramictile = 4.00; 
      double hardwood = 3.00; 
      double carpet = 2.00; 
      double linoleumtile = 1.00; 

      // Initialize Variables 
      int floortype; 
      int budget; 
      double length; 
      double height; 
      double width; 
      double ld = 0; 
      double hd = 0; 
      double lw1; 
      double hw1; 
      double lw2; 
      double hw2; 
      double lb; 
      double hb; 
      double wb; 
      double door = 0; 
      double window = 0; 
      double bookshelf = 0; 
      double doorspace = 0; 

      doorspace = itemd (door, ld, hd, doorspace); 
     // double costp; 
     // double costf; 

      // Initialize Scanner 
      Scanner keyboard = new Scanner (System.in); 

      System.out.println("Enter Number Of Doors"); 
      door = keyboard.nextDouble(); 
      for(int doors = 0; doors < door; doors++) 
      { 

       System.out.println("What is the length of the door (in feet)? "); 
       ld = keyboard.nextDouble(); 
       System.out.println("What is the height of the door (in feet)? "); 
       hd = keyboard.nextDouble(); 
       System.out.println("Doorspace is: " + doorspace); 

      } 



      System.out.println("Enter Number Of Windows"); 
      window = keyboard.nextDouble(); 
      for(int windows = 0; windows < window; windows++) 
      { 
       System.out.println("What is the length of the window (in feet)? "); 
       lw1 = keyboard.nextDouble(); 
       System.out.println("What is the height of the window (in feet)? "); 
       hw1 = keyboard.nextDouble(); 
      } 

      System.out.println("Enter Number Of Bookshelves"); 
      bookshelf = keyboard.nextDouble(); 
      for(int bookshelves = 0; bookshelves < bookshelf; bookshelves++) 
      { 
       System.out.println("What is the length of the bookcase (in feet)? "); 
       lb = keyboard.nextDouble(); 
       System.out.println("What is the height of the bookcase (in feet)? "); 
       hb = keyboard.nextDouble(); 
       System.out.println("What is the width of the bookcase (in feet)? "); 
       wb = keyboard.nextDouble(); 

      } 

    } 

      private static int itemd(double door, double ld, double hd, double doorspace) { 

       doorspace = ld *hd; 
       return (int) doorspace; 
      }     
} 

Answer 1

원본 코드에서 입력 값을 읽기 전에 문 공간 계산이 완료되었습니다. itemd에 전달되는

doorspace = itemd (door, ld, hd, doorspace); 
[...] 

// Initialize Scanner 
Scanner keyboard = new Scanner (System.in); 

System.out.println("Enter Number Of Doors"); 

그래서 ld 및 hd 당신은 계산을 이동해야 0입니다. 코멘트에서 언급 한 바와 같이 당신이 모든 문 관련 입력 값을 처리 한 번만 어쩌면 당신은`itemd`를 호출해야

System.out.println("Doorspace is: " + itemd (door, ld, hd, doorspace));