if else for练习

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            for (int i =1;i<=3 ;i++ )
            {
                if (i == 1)
                {
                    Console.Write("你到底爱不爱我？");
                }
                if (i == 2)
                {
                    Console.Write("我问你呢，你到底爱不爱我？");
                }
                if (i == 3)
                {
                    Console.Write("你聋了么？我问你爱不爱我！！");

                }
                string a = Console.ReadLine();
                if (a == "爱")
                {
                    Console.WriteLine("嗯，我也爱你。");
                    System.Threading.Thread.Sleep(2000);
                    Console.WriteLine("从此王子和公主过上了没羞没臊的生活！");
                    break;
                }
                else
                {
                    if (i == 3)

                    {
                        Console.WriteLine("滚！");
                    }
                }
            }

            Console.Write(" 请输入年份：");
            for (; ; )
            {
                int a = int.Parse(Console.ReadLine());
                if (a >= 0 && a <= 9999)
                {  
                    Console.Write("请输入月份：");
                    for (; ; )
                    {
                        int b = int.Parse(Console.ReadLine());
                        if (b <= 12 && b > 0)

                        {
                            Console.Write("请输入日期：");
                            for (; ; )
                            {
                                int c = int.Parse(Console.ReadLine());
                                if (c > 0 && c <= 31)
                                {
                                    Console.WriteLine("你输入的格式" + a + "年，" + b + "月，" + c + "日，格式正确");
                                    break;
                                }
                                else
                                {
                                    Console.Write("你输入的日期错误，请从新输入：");

                                }
                            }
                            break;
                        }
                        else
                        {
                            Console.Write("你输入的月份错误，请重新输入：");
                        }
                    }
                    break;
                }
                else

                {
                    Console.Write("你输入的年份错误，请重新输入：");
                }
            }

if else for练习

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原文地址：http://www.cnblogs.com/yy01/p/5269210.html