[C#小程序]命令行小程序之你要买大杯小杯还是中杯的实现代码

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks; namespace ConsoleManyHellos{    class Program    {        static void Main(string[] args)        {            Console.WriteLine("1=小杯3块，2=中杯4块，3=大杯5块");            Console.Write("你的选择？");            string s = Console.ReadLine();            int n = int.Parse(s);            switch (n)            {                case 1:                    Console.WriteLine("小杯，请支付3块钱；");                    break;                case 2:                    Console.WriteLine("中杯，请支付4块钱；");                    break;                case 3:                    Console.WriteLine("大杯，请支付5块钱；");                    break;                default:                    Console.WriteLine("默认中杯，请付款4块钱；");                    break;            }            Console.WriteLine("谢谢使用，祝您用餐愉快！");         }    }}