Question

我是c＃世界的新手。我一直在研究一个程序来从分数输入中确定学生成绩，这是1和100的范围。但它几乎无限地从头到尾循环。这是程序请问我能做什么......？

namespace ExamScore
{
    class YourExamScore
    {
        public string ExamScore(int[] value, int startindex, int endindex)
        {
            bool YourExamScore;
            var terminate = -1;


            for (var index = 0; index <= 100; index++)
            {

                if (YourExamScore = (value[90] <= value[99]))
                {
                    Console.WriteLine("You Have An Excellent Score");
                }
                else if (YourExamScore = (value[70] <= value[89]))
                {
                    Console.WriteLine("You Have a Good Score");
                }
                else if (YourExamScore = (value[50] <= value[69]))
                {
                    Console.WriteLine("You Have a Satisfactory Score");
                }
                else if (YourExamScore = (value[0] <= value[49]))
                {
                    Console.WriteLine("You Have a Satisfactory Score");
                }
                else
                {
                    return terminate.ToString();
                }
            }

            return "";

        }


        static void Main(string[] args)
        {
            int YourExamScore;
            {
                Console.WriteLine("Input Your Exam Score");
                YourExamScore = Convert.ToInt32(Console.ReadLine());
            }
            { 
            var e = new YourExamScore();
            var value = new int[100] {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,
           31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,
           64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100};

                    Console.WriteLine(e.ExamScore(value, 90, 100));
                    Console.ReadKey();
                    Console.WriteLine(e.ExamScore(value, 70, 89));
                    Console.ReadKey();
                    Console.WriteLine(e.ExamScore(value, 50, 69));
                    Console.ReadKey();
                    Console.WriteLine(e.ExamScore(value, 0, 49));
                    Console.ReadKey();
            }

        }
    }
}

并输出此

你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高你的分数很高

Answer 1

您根本不需要循环或数组：

class Program
{
    static void Main(string[] args)
    {
        Console.WriteLine("Input Your Exam Score");
        var examScore = Convert.ToInt32(Console.ReadLine());

        var grade = GetGrade(examScore);
        Console.WriteLine(grade);
    }

    private static string GetGrade(int examScore)
    {
        if (examScore >= 90)
            return "Excellent";

        if (examScore >= 70)
            return "Good";

        return "Satisfactory";
    }
}

Answer 2

你的if语句没有比较==他们正在分配=，如果评估的话，它将始终为真

Answer 3

对于你应该写的条件：

int score = value[index];
if (90 <= score && score <= 99))
{
     Console.WriteLine("You Have An Excellent Score");
}
// ... etc.

希望这是你无限循环的意思。

Answer 4

您可以更有效地重写程序：

public class ScoreRange {
    public int Min { get; set; }
    public int Max { get; set; }
    public string Message { get; set; }
}

你的主要人物：

int YourExamScore;
Console.WriteLine("Input Your Exam Score");
YourExamScore = Convert.ToInt32(Console.ReadLine());

        List<ScoreRange> ranges = new List<ScoreRange>();
        ranges.Add(new ScoreRange() {
            Min = 0,
            Max = 49,
            Message = "You Have a Satisfactory Score"
        });
        ranges.Add(new ScoreRange() {
            Min = 50,
            Max = 69,
            Message = "You Have a Satisfactory Score"
        });
        ranges.Add(new ScoreRange() {
            Min = 70,
            Max = 89,
            Message = "You Have a Good Score"
        });
        ranges.Add(new ScoreRange() {
            Min = 90,
            Max = 100,
            Message = "You Have An Excellent Score"
        });



        string message = ranges.First(x => x.Min <= YourExamScore && YourExamScore <= x.Max).Message;
        Console.WriteLine(message);

请注意，您应该检查您的考试成绩范围是否在0到100之间

如何摆脱无尽的循环？

4 个答案: