Question

对编程有点新意，我努力想弄清楚的问题就是这个问题。我的控制台应用程序询问用户他们想要输入多少测试分数，以计算所有分数的平均值和总数。如果他们输入3，则要求他们输入3个测试分数，然后显示所有分数的平均值和总数。它然后问他们他们想要继续或结束程序，如果他们输入是继续它应该从头开始。我的问题是，当我说是，它不能清除它只是从前一个继续的总数或分数，只是将新分数添加到那个。

 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("To end the program enter 999.");
           System.out.println();  // print a blank line

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

           // get a series of test scores from the user
           while (!choice.equalsIgnoreCase("n"))
           {
               System.out.println("Enter the number of test score to be entered: ");
               int numberOfTestScores = sc.nextInt();

               for (int i = 1; i <= numberOfTestScores; i++)
               {
                    // get the input from the user
                    System.out.print("Enter score " + i + ": ");
                    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");


                }
                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();
                System.out.println("Enter more test scores? (y/n)");
                choice= sc.next();
          }



    // display the score count, score total, and average score



    }
}

Answer 1

只需在while循环开始后移动得分变量声明：

// create a Scanner object
Scanner sc = new Scanner(System.in);
String choice = "y";

// get a series of test scores from the user
while (!choice.equalsIgnoreCase("n"))
{
    // initialize variables
    int scoreTotal = 0;
    int scoreCount = 0;
    int testScore = 0;

    System.out.println("Enter the number of test score to be entered: ");
    int numberOfTestScores = sc.nextInt();

这样，每次进程重新开始时，它们将被初始化为0.

Answer 2

while循环内的第一个语句应将scoreTotal和scoreCount设置为0。

将支架放在正确的位置有问题吗？

2 个答案: