두 코드간에 다른 결과가 나타나는 이유는 무엇입니까?

Question

첫 번째 코드는 Lynda.com에서 할당 한 코드입니다. 두 번째 코드는 과제에 대한 교사의 답변입니다. 여기 저기에있는 몇 마디 말고는 논리 또는 방정식의 차이를 찾을 수 없었지만, 첫 번째 코드는 두 번째 해답보다 더 낮은 해법으로 숫자를 제공합니다. 내가 발견

public class SimpleCalculation { 


public static void main(String[] args) { 
// Declare all variables 
// Ask for the house length, width, and height 
// Ask for the number and size of windows 
// Ask for the number and size of doors 
// Calculate total surface area to be painted 
double w, l, h; 
double numWin, winWidth, winHeight; 
double numDoors, doorWidth, doorHeight; 
double surfaceArea; 
Scanner in = new Scanner(System.in); 
System.out.println("Please enter the width, length and height of your house: "); 
w = in.nextDouble(); 
l = in.nextDouble(); 
h = in.nextDouble(); 
System.out.println("Please enter the number of windows, width and height: "); 
numWin = in.nextDouble(); 
winWidth = in.nextDouble(); 
winHeight = in.nextDouble(); 
System.out.println("Please enter the number of doors, width and height: "); 
numDoors = in.nextDouble(); 
doorWidth = in.nextDouble(); 
doorHeight = in.nextDouble(); 
surfaceArea = (w * h * 2 + 1 * h * 2) - (numWin * winWidth * winHeight + 
     numDoors * doorWidth * doorHeight); 
System.out.println("The total paintable surface area is: "+ surfaceArea); 



} 

} 







public class SimpleCalculation_Final { 

/** 
* @param args the command line arguments 
*/ 
public static void main(String[] args) { 
    double w, l, h; 
    double numWin, winWidth, winHeight; 
    double numDoors, doorWidth, doorHeight; 
    double surfaceArea; 
    System.out.println("Please enter the width, length and height of " 
      + "the house to be painted"); 
    Scanner in = new Scanner(System.in); 
    w = in.nextDouble(); 
    l = in.nextDouble(); 
    h = in.nextDouble(); 
    System.out.println("Please enter the number of windows, width and height"); 
    numWin = in.nextDouble(); 
    winWidth = in.nextDouble(); 
    winHeight = in.nextDouble(); 
    System.out.println("Please enter the number of doors, width and height"); 
    numDoors = in.nextDouble(); 
    doorWidth = in.nextDouble(); 
    doorHeight = in.nextDouble(); 
    surfaceArea = (w * h * 2 + l * h * 2) - (numWin * winWidth * winHeight + 
      numDoors * doorWidth * doorHeight); 
    System.out.println("The total paintable surface area is: "+ surfaceArea); 
} 

} 

Answer 1

한 가지, 두 번째 코드는 l * h * 2있는 동안 당신이 (먼저 하나 인 제 2는 소문자 L입니다), 1 * h * 2을 가지고있다.

전체 코드를 검사하지 않았으므로 다른 점이있을 수 있습니다.