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我收到一个错误，说令牌“;”上的语法错误，这是预期的。我在做什么错或我错过了什么，错误来自字符串输入字符串。我试图创建我可以输入学生成绩的地方，然后将成绩平均在一起，所以我不确定我是否做得对。请帮忙！！！关于如何做到这一点的任何想法？帮助将不胜感激。

import java.util.Scanner;         //To hold the users score

import javax.swing.JOptionPane;  //For better style

 import java.text.DecimalFormat; //needed to format the Output


public class TestScore
{//begin class

    public static void main(String[] args)

    {//Begin main method



        //create the variables

     String inputString ;       // For reader's input

               DoubleScore1,      //Define DoubleScore 1

                DoubleScore2,     //Define DoubleScore 2

                DoubleScore3,    //Define DoubleScore 3

                AverageScore; //Define AverageScore



Scanner keyboard = new Scanner(System.in); //To hold the users grade


DecimalFormat formatter = new DecimalFormat("#,##0.00"); //format the scores



        //create keyboard for input

        Scanner Keyboard = new Scanner(System.in);



        //Ask the user to input DoubleScore1

        inputString=

          JOptionPane.showInputDialog("Please enter test score 1");



            // Convert the input to a double.

             DoubleScore1 = Double.parseDouble(inputString);



        //Ask the user to input DoubleScore

        inputString=

          JOptionPane.showInputDialog("Please enter test score 2");



            // Convert the input to a double

        DoubleScore2 = Double.parseDouble(inputString);



        //Ask the user to input DoubleScore

        inputString=

          JOptionPane.showInputDialog("Please enter test score 3");



            // Convert the input to a double

            DoubleScore3 = Double.parseDouble(inputString);







        //Calculate the average score for the tests

        AverageScore = ((DoubleScore1 + DoubleScore2 + DoubleScore3)/3);



        //Display Average test Score

        JOptionPane.showMessageDialog(null, "\t\nYour Double Score 1  is : "     +formatter.format(DoubleScore1)

                                      + "\t\nYour Double Score 2  is : " +formatter.format(DoubleScore2)

                                      + "\t\nYour Double Score 3  is : " +formatter.format(DoubleScore3)

                                      + "\t\nYour Average Score is: " +     formatter.format(AverageScore));

            //End the program.

          System.exit(0);



    }//End main method



}//end class`enter code here`
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2 回答 2

1

这个

String inputString ;       // For reader's input

               DoubleScore1,      //Define DoubleScore 1

                DoubleScore2,     //Define DoubleScore 2

                DoubleScore3,    //Define DoubleScore 3

                AverageScore; //Define AverageScore

应该

String inputString ,       // For reader's input

               DoubleScore1,      //Define DoubleScore 1

                DoubleScore2,     //Define DoubleScore 2

                DoubleScore3,    //Define DoubleScore 3

                AverageScore; //Define AverageScore

;将结束该行，因此下一行必须再次声明该字段，或者使用,说它也是相同的类型。

               String inputString;       // For reader's input

               Double DoubleScore1,      //Define DoubleScore 1

                      DoubleScore2,     //Define DoubleScore 2

                     DoubleScore3,    //Define DoubleScore 3

                   AverageScore; //Define AverageScore
于 2013-03-08T16:21:27.737 回答
1

您需要声明变量 DoubleScore 的类型：

double DoubleScore1;
于 2013-03-08T16:21:52.553 回答