所以我想做的是要求用戶輸入他們的體重和考試 1 和 2 的分?jǐn)?shù)，如果他們輸入分?jǐn)?shù)，則使用這些變量來計(jì)算當(dāng)前分?jǐn)?shù)。但是，由于分?jǐn)?shù)是由用戶通過 if 語句內(nèi)部的掃描器聲明的，因此它不允許我從 if 語句外部使用這些變量。當(dāng)我想計(jì)算 csEx1 和 csEx2 時(shí)，如何使用變量“examOneScore”和“examTwoScore”。當(dāng)我嘗試使用它們時(shí)，它顯示“局部變量 examOneScore 可能尚未初始化?！眎mport java.util.Scanner;public class CurrentScore{    public static void main(String[] args)     {       Scanner keyboard = new Scanner(System.in);       System.out.printf("Weight of Exam 1: ");       double weightExamOne = keyboard.nextDouble();       System.out.printf("Weight of Exam 2: ");       double weightExamTwo = keyboard.nextDouble();       System.out.printf("Do you know your score of first exam? ");          String examOne = keyboard.nextLine();       if(examOne.equalsIgnoreCase("yes") || examOne.equalsIgnoreCase("y"))         {           System.out.printf("Your score? ");           double examOneScore = keyboard.nextDouble();       }       System.out.printf("Do you know your score of secondexam? ");        String examTwo = keyboard.nextLine();       if(answerTwo.equalsIgnoreCase("yes") || answerTwo.equalsIgnoreCase("y"))         {           System.out.printf("Your score? ");           double examTwoScore = keyboard.nextDouble();       }       double csEx1 = (weightExamOne * examOneScore);       double csEx2 = (weightExamTwo * examTwoScore );     }}