java - 使用 do-while 循环创建 for 循环时遇到问题

Question

刚开始使用 Java，本周我的作业是编写一个程序，询问用户想要输入多少测试分数，用户填写该分数，然后程序要求他们输入测试分数，直到计数器达到我觉得我首当其冲，但只需要更多帮助，这有点陷入死循环，我陷入了困境。我已经移动了 for 循环，它要么将我的显示文本放入永无休止的循环中，要么程序在要求输入分数后停止(这就是现在的位置)。感谢任何帮助:

import java.util.Scanner;
public class TestScoreApp
{
public static void main(String[] args)
{
    // display operational messages
    System.out.println("Please enter test scores that range from 0 to 100.");
    System.out.println();  // print a blank line

    // initialize variables and create a Scanner object
    int scoreTotal = 0;
    int scoreCount = 0;
    int testScore = 0;
    int count = 0;
    Scanner sc = new Scanner(System.in);
    String choice = "y";
    while (!choice.equalsIgnoreCase("n"))

    while (testScore <= 100)
    {

        // get the input from the user
        System.out.print("Enter the number of scores to be entered: ");
        for (scoreCount = 0; count <=100; scoreCount++)
        scoreCount = sc.nextInt();       

        // get the input from the user
        System.out.print("Enter score: ");
        testScore = sc.nextInt();

        // accumulate score count and score total
        if (testScore <= 100)

        {
            scoreCount = scoreCount + 1;
            scoreTotal = scoreTotal + testScore;
        }
    else if (testScore != 999)
        System.out.println("Invalid entry, not counted");

    // display the score count, score total, and average score
    double averageScore = scoreTotal / scoreCount;
    String message = "\n" +
                      "Score count:   " + scoreCount + "\n"
                    + "Score total:   " + scoreTotal + "\n"
                    + "Average score: " + averageScore + "\n";

    System.out.println(message);       
    System.out.println("Enter more test scores? ('y' to continue, 'n' to close):  ");
    choice = sc.next();
    System.out.println();



         }  
    }
}

Answer 1

尝试这样的事情:

// put this above main() - this way you can use it without ever defining a `Scanner` object again
static Scanner in = new Scanner(System.in);

public static void main(String[] args) {

  // store number of scores to enter
  int numScores = 0;

  // input number of scores to enter
  System.out.print("How many scores would you like to enter? ");
  numScores = in.nextInt();

  // store sum of scores
  int scoreTotal = 0;

  // input scores
  for(int i = 0; i < numScores; i++)
    scoreTotal += in.nextInt();

  // print count, sum, and average of scores
  System.out.printf("\nScore count: %d", numScores);
  System.out.printf("\nScore total: %d", scoreTotal);
  System.out.printf(\n Average score: %d", scoreTotal/numScores);
}

我认为这应该可以运行，但它可能有一两个错误。我不再有 Java，但如果它产生错误，我将能够提供帮助。只需将其放入您的类(class)中，看看它是如何工作的。您根本不需要修改它。