C#简单题目练习-1_c#练习题

题目（C#）：

using System;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            //变量定义

            int Sum = 0;

            int[] Number = new int[5];

            string input = null;
            do
            {
                //输入
                Console.Write("\n请输入五位整数（以空格分割）：");

                input = Console.ReadLine();

                //数据处理

                Number = Data(input);

                if(Number == null)
                {
                    Console.Write("按enter键直接结束循环，按任意键继续循环：");
                    continue;
                }

                Array.Sort(Number);

                Console.Write("顺序输出为：");

                for (int i = 0; i < Number.Length; i++)
                {
                    Console.Write(Number[i]+"\t");
                    Sum += Number[i];
                }

                Console.Write("\n逆序输出为：");

                for (int i = 4; i >= 0; i--)
                {
                    Console.Write(Number[i] + "\t");
                }

                Console.WriteLine("\n和为：" + Sum);
                Console.WriteLine("平均值为：{0:F1}" , (float)Sum/5);
                Console.WriteLine("最大值为：" + Number[4]);

                Console.Write("按enter键直接结束循环，按任意键继续循环：");
            } while (Console.ReadKey(true).Key != ConsoleKey.Enter);

            Console.WriteLine("循环结束");
        }
        static int[] Data(String input)

        {
            bool flag = true;

            string[] inputs = input.Split("".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

            int[] number = new int[5];

            if(inputs.Length != 5)
            {
                flag = false;
                Console.WriteLine("非法输入");
            }

            for(int i =0; i< inputs.Length; i++)
            {
                try
                {
                    number[i] = int.Parse(inputs[i]);
                }
                catch
                {
                    Console.WriteLine("非法输入");
                    flag = false;
                    break;
                }
            }

            if (flag)
            {
                return number;
            }
            else
            {
                return null;
            }

        }
    }
}

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