Question

程序成功编译并运行。然而，最低分的价值是错误的，我再次检查，不知道为什么请帮我解决这个问题

/* import neccessary component for the program*/
import java.util.*;

public class assign4 {

    /* create a input stream*/ 
    static Scanner console = new Scanner(System.in);

    public static void main(String[]args) {

        /* declare variables and strings*/
        int[] score;

        score = new int[10];
        String[] name;

        name = new String[10];
        String header = String.format("%10s%10s%8s%n", "Name", "Score", "Grade");
        int min = score[0];
        int max = score[0];
        char grade[];

        grade = new char[10]; 
        int maxindex = 0;
        int lowindex = 0;

        for (int i = 0; i <= 9; i++) {

            /* Get user's input for student's name and score*/   
            System.out.println("Please enter the student's name.");
            name[i] = console.nextLine();
            System.out.println("Please enter the student's score.( 0-100 )");
            score[i] = console.nextInt();

            if (score[i] > 80) {
                grade[i] = 'A';
            } else if (score[i] > 65) {
                grade[i] = 'B';
            } else if (score[i] > 40) {
                grade[i] = 'C';
            } else if (score[i] > 20) {
                grade[i] = 'D';
            } else {
                grade[i] = 'E';
            } 

            /* when the score is higher than the score, it become maximum score*/
            if (score[i] > max) {
                max = score[i];
                maxindex = i;
            } /* when the score is lower than the score, it become minimum score*/ else if (score[i]
                    < min) {
                min = score[i];
                lowindex = i;
            } /* when the score neither lower or higher than the score, it will be ignored and program         
             do nothing*/ else {} 

            /* avoid scanner skipping in order to capture user's input */
            console.nextLine();
        }

        /* print out the stored information of the students and show higest and lowest score */
        System.out.println();
        System.out.print(header);
        for (int i = 0; i <= 9; i++) {
            System.out.printf("%10s%10d%8s%n", name[i], score[i], grade[i]);
        } 
        System.out.printf("%s obtains lowest score of %d%n", name[lowindex], min);
        System.out.printf("%s obtains higest score of %d%n", name[maxindex], max); 

    }
}

该计划的目的是收集10人的分数和名称，然后打印出姓名，分数，最高分，最低分和分数。此外，我只是加入这个网站，如果我提出的方法和问题是错误的，请告诉我，对不起

Answer 1

您初始化int min = score[0];将为0，因为score是int[]，每个条目的默认值为0。

您可能没有得到低于0的任何分数，因此if(score[i]<min)仅对负值有效。尝试使用min初始化Integer.MAX_VALUE。

最好使用max初始化Integer.MIN_VALUE，但在您的情况下无关紧要。

使用循环存储数组并比较最高和最低值

1 个答案: