需要帮助来简化我的代码中的方法

debugcn 发表于 Dev

乔什·布拉根（Josh Bragen）

我该如何解决dedecentGrade（）; 这样，在输入每个新的Int输入后，它就会给您一个成绩。我可以只对res2和res3重复res1，但是没有更简单的方法吗？

import java.util.Scanner;

public class Answer3 {

    static int avg;

    static int res1;

    static int res2;

    static int res3;

    static Scanner inPut = new Scanner(System.in);


    public static void main(String[] args) {


        calcAverage();

    }

    static void calcAverage()
    {

        System.out.println("Please input exam 1 results");
        res1 = inPut.nextInt();
        determineGrade();
        System.out.println("Please input exam 2 results");
        res2 = inPut.nextInt();
        determineGrade();
        System.out.println("Please input exam 3 results");
        res3 = inPut.nextInt();
        determineGrade();
        avg = (res1 + res2 + res3) / 3;

        System.out.println("The average of these exam results are " + avg);
    }

    static void determineGrade()
    {
        String grade = null;

        if ( res1 > 84 && res1 <101  )
        {
            grade = "HD";
        }
        else if ( res1 > 74 && res1 <85 )
        {
            grade = "D";
        }
        else if ( res1 > 64 && res1 < 75 )
        {
            grade = "C";
        }
        else if ( res1 > 49 && res1 < 65 )
        {
            grade = "P";
        }
        else if ( res1 < 50 )
        {
            grade = "F";
        }

        System.out.println("Your grade is " + grade);
    }

}

您可以尝试以下解决方案。

determineGrade将返回等级-您仅对主要方法限制打印结果。也resCount使您的程序更加动态，更易于扩展。

public class Answer3 {

    static int resCount = 3;
    static Scanner inPut = new Scanner(System.in);

    public static void main(String[] args) {
        calcAverage();
    }

    static void calcAverage() {
        int sum = 0;

        for (int i = 0; i < resCount; i++) {
          System.out.println("Please input exam " + i + " results");

          int res = inPut.nextInt();
          sum += res;

          String grade = determineGrade(res);
          System.out.println("Your grade is " + grade);
        }

        double avg = sum / resCount;
        System.out.println("The average of these exam results are " + avg));
    }

    static String determineGrade(int res) {
        if ( res > 84 && res <101 ) {
            return "HD";
        } else if ( res > 74 && res <85 ) {
            return "D";
        } else if ( res > 64 && res < 75 ) {
            return "C";
        } else if ( res > 49 && res < 65 ) {
            return "P";
        } else {
            return "F";
        }
    }

}

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