1 using System;
2 using System.Globalization;
3
4 class Program
5 {
6 public static void Main(string[] args)
7 {
8 var year = GetInt();
9 var month = GetMonth();
10 var days = 0;
11 switch (month)
12 {
13 case 4:
14 case 6:
15 case 9:
16 case 11:
17 days = 30;
18 break;
19 case 2:
20 days = IsLeapYear(year) ? 29 : 28;
21 break;
22 default:
23 days = 31;
24 break;
25 }
26 print(days);
27 } //Main函数结束
28
29 /// <summary>
30 /// 获得一个正确的月份
31 /// </summary>
32 /// <returns></returns>
33 private static int GetMonth()
34 {
35 var m = 0;
36 while (true)
37 {
38 m = GetInt();
39 if (m > 12 || m < 0)
40 {
41 print("输入的月份有误,请重新输入!");
42 }
43 else
44 {
45 break;
46 }
47 }
48 return m;
49 }
50
51 /// <summary>
52 /// 判断给定的年份是否是闰年
53 /// </summary>
54 /// <param name="year"></param>
55 /// <returns></returns>
56 public static bool IsLeapYear(int year)
57 {
58 return year % 400 == 0 || year % 4 == 0 && year % 100 != 0;
59 }
60
61 #region 工具方法
62
63 public static void print(string obj, params object[] arg)
64 {
65 Console.WriteLine(obj, arg);
66 }
67
68 public static void print(object obj)
69 {
70 Console.WriteLine(obj);
71 }
72
73 /// <summary>
74 /// 获得一个int类型的值
75 /// </summary>
76 /// <returns></returns>
77 public static int GetInt()
78 {
79 int i;
80 while (true)
81 {
82 try
83 {
84 i = Convert.ToInt32(Console.ReadLine());
85 break;
86 }
87 catch (FormatException e)
88 {
89 Console.WriteLine(e.Message);
90 }
91 }
92 return i;
93 }
94
95 public static string GetString()
96 {
97 return Console.ReadLine();
98 }
99
100 public static double GetDouble()
101 {
102 double i;
103 while (true)
104 {
105 try
106 {
107 i = Convert.ToDouble(Console.ReadLine());
108 break;
109 }
110 // catch
111 catch (FormatException e)
112 {
113 Console.WriteLine(e.Message);
114 }
115 }
116 return i;
117 }
118
119 #endregion
120 }
