java - ParadiseInfo2 变量错误代码

Question

import java.util.Scanner;
public class ParadiseInfo2
{
   public static void main(String[] args)
   {
   double price;
   double discount;
   double savings;
   Scanner keyboard = new Scanner(System.in);
      System.out.print("Enter cutoff price for discount >>");
      price = keyboard.nextDouble();

      System.out.print("Enter discount rates as a whole number >> ");
      discount = keyboard.nextDouble();
      System.out.println("Special this week on any service over " +
         price);
      System.out.println("Discount of " + discount + " percent");
      System.out.println("That's a savings of at least $" + savings);

   displayInfo();
   savings = computeDiscountInfo(price, discount);
   }
   public static void displayInfo()
   {
      System.out.println("Paradise Day Spa wants to pamper you.");
      System.out.println("we will make you look good.");
   }
public static double computeDiscountInfo(double pr, double dscnt)
   {
   double savings;
   savings = pr * dscnt / 100;
   return savings;

   }
}

我在上面的代码中不断收到以下错误。我不知道如何解决它。感谢您的帮助!

ParadiseInfo2.java:18: error: variable savings might not have been initialized System.out.println("That's a savings of at least $" + savings);

Answer 1

main 的最后一行设置了 savings，但您在此之前使用它来print 它。将其更改为类似的内容

// System.out.println("That's a savings of at least $" + savings);
displayInfo();
savings = computeDiscountInfo(price, discount);
System.out.println("That's a savings of at least $" + savings);