第一版參考解答:

using System;

namespace homework5
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("請輸入班級人數");
            int peopleNum = int.Parse(Console.ReadLine());
            double[] score = new double[peopleNum];

            double average = 0;

            for (int i = 0; i < peopleNum; i++)
            {
                
                Console.WriteLine("請輸入第" + (i + 1) + "位同學的成績");
                score[i] = double.Parse(Console.ReadLine());

               
            }


            Console.WriteLine("編號\t\t成績");  // \t可以水平定位
            Console.WriteLine("--------------------");

            for (int i = 0; i < peopleNum; i++)
            {
                Console.WriteLine((i + 1) + "\t\t" + score[i]);
            }
            Console.WriteLine("--------------------");

        }
    }
}


第二版參考解答:

using System;

namespace homework5
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("請輸入班級人數");
            int peopleNum = int.Parse(Console.ReadLine());
            double[] score = new double[peopleNum];

            double total = 0;
            double average = 0;

            for (int i = 0; i < peopleNum; i++)
            {
                
                Console.WriteLine("請輸入第" + (i + 1) + "位同學的成績");
                score[i] = double.Parse(Console.ReadLine());
                total += score[i];
            }


            Console.WriteLine("編號\t\t成績");  // \t可以水平定位
            Console.WriteLine("--------------------");

            for (int i = 0; i < peopleNum; i++)
            {
                Console.WriteLine((i + 1) + "\t\t" + score[i]);
            }
            Console.WriteLine("--------------------");

            average = total / peopleNum;

            Console.WriteLine("平均\t\t" + average);


        }
    }
}


第三版參考解答:

using System;

namespace homework5
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("請輸入班級人數");
            int peopleNum = int.Parse(Console.ReadLine());
            double[] score = new double[peopleNum];

            double total = 0;
            double average = 0;

            for (int i = 0; i < peopleNum; i++)
            {
                
                Console.WriteLine("請輸入第" + (i + 1) + "位同學的成績");
                score[i] = double.Parse(Console.ReadLine());

                while (score[i] > 100 || score[i] <0)
                {
                  Console.WriteLine("成績有誤，請重新輸入!");
                  score[i] = double.Parse(Console.ReadLine()); 
                }

                total += score[i];
            }


            Console.WriteLine("編號\t\t成績");  // \t可以水平定位
            Console.WriteLine("--------------------");

            for (int i = 0; i < peopleNum; i++)
            {
                Console.WriteLine((i + 1) + "\t\t" + score[i]);
            }
            Console.WriteLine("--------------------");

            average = total / peopleNum;

            Console.WriteLine("平均\t\t" + average);


        }
    }
}