將分數問題轉換爲十進制轉換器

Question

我已經測試了這些數字，並且它們保留了正確的值，但它打印出的最終結果完全錯誤。 E.X：如果我把2/4，它輸出1

這裏是我的代碼：

import java.util.Scanner; 

public class FractionConverter { 
    public static void main(String[] args) { 

     System.out.println("Welcome To The JEM Fraction Converter!\n"); 

     Scanner sc = new Scanner(System.in); 
     String num = "0", choice; 

     System.out.println("Would You Like To Convert From 'Fraction - Decimal'(a) or 'Decimal - Fraction'(b)?"); 
     choice = sc.nextLine(); 

     if (choice.equalsIgnoreCase("a")) { 

      System.out.println("Please Enter A Fraction (x/y)"); 
      num = sc.nextLine(); 

     String[] parts = num.split("/"); 

     String numerator = parts[0]; 

     String denominator = parts[1]; 

     double result = Double.parseDouble(numerator); 
     double result2 = Double.parseDouble(numerator); 

     System.out.println("\n" + numerator + "/" + denominator + " In Decimal Form Is: " + (result/result2)); 

     } 

    } 
} 

感謝幫助！

Answer 1

替換此行：

double result2 = Double.parseDouble(numerator); 

與此：

double result2 = Double.parseDouble(denominator); 

Answer 2

double result = Double.parseDouble(numerator); 
    double result2 = Double.parseDouble(numerator); 

...我想是一個複製/粘貼問題，不是嗎？ （兩次分子）