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- CSDN专家-showbo 2021-06-26 21:01关注
2)
using System; namespace ConsoleApp1 { class Program { static void Main(string[] args) { Console.Write("请输入姓名:"); string name = null; while ((name = Console.ReadLine()).Trim() == "") { Console.Write("姓名不能为空,请重新输入姓名:"); } Console.Write("请输入年龄(15-25岁之间):"); int age; while (true) { try { age = int.Parse(Console.ReadLine()); if (age >= 15 && age <= 25) break; else Console.Write("年龄需要15-25岁,请重新输入年龄(15-25岁之间):"); } catch { Console.Write("年龄为数字,请重新输入年龄(15-25岁之间):"); } } Console.Write("请输入email地址:"); string email = null; while ((email = Console.ReadLine().Trim()).IndexOf("@") ==-1) { Console.Write("email地址错误,请重新输入email地址:"); }; Console.WriteLine("输入的信息为:{0}\t{1}\t{2}", name, age, email); Console.ReadKey(); } } }
3)
using System; namespace ConsoleApp1 { class Program { static void Main(string[] args) { string str = Console.ReadLine(); int index = str.IndexOf("@"); string name = str.Substring(0, index - 1); int dotIndex = str.IndexOf("."); string domain = str.Substring(index + 1, dotIndex - index) + str.Substring(dotIndex + 1);//增加获取com的代码 Console.WriteLine(name); Console.WriteLine(domain); Console.ReadKey(); } } }
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