.Net基础篇_学习笔记_第五天_流程控制while循环002

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace 流程语句02
 {
     class Program
     {
         static void Main(string[] args)
         {

             string anwer= "";
             int i = ;
             while (anwer != "yes" && i <= )
             {
                 Console.WriteLine("你们会了么？yes/no?这已经是讲的第{0}遍了", i);
                 anwer = Console.ReadLine();
                 if (anwer == "yes")
                 {
                     Console.WriteLine("既然会了，可以放学啦！");
                     break;
                 }
                 i++;
             }
             while (i > )
             {
                 Console.WriteLine("老师都已经讲了第{0}遍了，你们不会也放学吧！",i);
                 break;
             }
             Console.ReadKey();

         }
     }
 }

练习二：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

 namespace 流程语句02
 {
     class Program
     {
         static void Main(string[] args)
         {
             double person = ;
             int year = ;
             while (person < )
             {
                 person *= 1.25;
                 year++;
             }
             Console.WriteLine("在{0}年，人数超过200000人",year);
             Console.ReadKey();

         }
     }
 }