如何从计算最高数和平均值中排除某个范围内的输入数？答案

【问题标题】：How to exclude an input number within a range from calculating the highest number and average?如何从计算最高数和平均值中排除某个范围内的输入数？
【发布时间】：2017-10-25 10:43:52
【问题描述】：

在我的程序中，我试图让用户输入一个不确定的分数，介于 0 到 100 之间，如果它低于 0 或超过 100，则会出现错误消息，直到用户输入“999”，然后显示输入的成绩数、最高数、最低数和平均数。

我的程序中的所有东西都可以正常工作，但是我不知道如何排除“999”，该“999”使用户能够输入最高等级和平均水平的数字。

这是我的代码：

import java.util.Scanner;

public class TestScoreStatistics
{
public static void main(String[] args)
{
  int numberOfScores = 0;
  int highest = 0;
  int lowest = 100;
  double average;
  Integer score = 0;
  int sumOfScores = 0;

  Scanner input = new Scanner(System.in);

  System.out.println("Please enter a grade or enter 999 to finish >> ");
  score = input.nextInt();
  sumOfScores = sumOfScores + score;


     while (score != 999 && score <= 100 && score >= 0)
     {

      System.out.println("Please enter a grade or enter 999 to finish >> ");
      score = input.nextInt();
      sumOfScores = sumOfScores + score;
      ++numberOfScores;
      if(score > highest){
      highest=score;}
      else if(score<lowest){
      lowest=score;}
     }
        while (score != 999 && score > 100 || score < 0)
        {
            System.out.println("You entered an invalid score. Please enter a valid test score.");
            System.out.println("Please enter a grade or enter 999 to finish >> ");
            score = input.nextInt();
            sumOfScores = sumOfScores + score;

        }
             if (score == 999)
             {
             System.out.println("Number of Scores you entered: " + numberOfScores);
             System.out.println("Highest Score: " + highest);
             System.out.println("Lowest Score: " + lowest);
             average = sumOfScores / numberOfScores;
             System.out.println("Average Score: " + average);
             }
  }
}

【问题讨论】：

标签： java

【解决方案1】：

您有两个额外的循环，我将从一个无限循环开始，检查999 和有效性，然后增加值（并更新highest 和lowest 等）。喜欢，

public static void main(String[] args) {
    int numberOfScores = 0, highest = 0, lowest = 100;
    int sumOfScores = 0;

    Scanner input = new Scanner(System.in);
    while (true) {
        System.out.println("Please enter a grade or enter 999 to finish >> ");
        int score = input.nextInt();
        if (score == 999) {
            break; // <-- end the loop
        } else if (score > 100 || score < 0) {
            System.out.println("You entered an invalid score. " 
                    + "Please enter a valid test score.");
        } else {
            sumOfScores += score;
            numberOfScores++;
            highest = Math.max(highest, score);
            lowest = Math.min(lowest, score);
        }
    }
    System.out.println("Number of Scores you entered: " + numberOfScores);
    System.out.println("Highest Score: " + highest);
    System.out.println("Lowest Score: " + lowest);
    double average = sumOfScores / (double) numberOfScores;
    System.out.println("Average Score: " + average);
}

【讨论】：