1 /*编写日期2021/8/16
 2 **开发者：市井道士
 3 **为方便同样在此学习的各位同学，在此放出自己的答案供大家参考学习，仅供参考，随意转载*/
 4 using System;
 5 
 6 namespace d03
 7 {
 8 class Program
 9 {
10 static void Main(string[] args)
11 {
12 Calendar calendar = new Calendar();
13 calendar.Printdate(DateTime.Now.Year);
14 Console.WriteLine("编写日期2021/8/16");
15 Console.WriteLine("开发者：市井道士");
16 Console.WriteLine("为方便同样在此学习的各位同学，在此放出自己的答案供大家参考学习，仅供参考，随意转载");
17 Console.ReadLine();
18 }
19 }
20 class Calendar
21 {
22 /// <summary>
23 /// 输入年月日，得到这天是星期几
24 /// </summary>
25 /// <param name="year">年</param>
26 /// <param name="month">月</param>
27 /// <param name="day">日</param>
28 /// <returns>星期几</returns>
29 private static int GetWeekByDay(int year, int month, int day)
30 {
31 DateTime dt = new DateTime(year, month, day);
32 return (int)dt.DayOfWeek;
33 }
34 
35 /// <summary>
36 /// 获取某个月的天数，输入(int)年份，月份，返回天数(int)
37 /// </summary>
38 /// <param name="year">年</param>
39 /// <param name="month">月</param>
40 /// <returns>天数</returns>
41 private static int GetMonthDay(int year, int month)
42 {
43 int thismonthdays = DateTime.DaysInMonth(year, month);
44 return thismonthdays;
45 }
46 /// <summary>
47 /// 打印年历
48 /// </summary>
49 /// <param name="year"></param>
50 public void Printdate(int year)
51 {
52 int nextlinecount;//使用一个计数器没过一天就加1，逢7换行
53 for (int month = 1; month <= 12; month++)
54 {
55 nextlinecount = 0;//计数器每个月开始需要进行初始化
56 Console.WriteLine("{0}年{1}月",year, month);
57 Console.WriteLine("星期天\t 星期一\t 星期二\t 星期三\t 星期四\t 星期五\t 星期六\t");
58 //获取每个月第一天是星期几然后输出对应次数的空格
59 for (int count=1;count <= GetWeekByDay(year,month,1);count++ ){
60 Console.Write(" \t ");
61 nextlinecount++;//计数器增加，这里的空的是上个月的日子
62 }
63 for (int day = 1; day <= GetMonthDay(year, month); day++)
64 {
65 if (nextlinecount % 7 == 0)//每次打印日期前先判断是否为周六，逢7换行
66 Console.WriteLine();
67 Console.Write(day+"\t ");
68 nextlinecount++;
69 }
70 Console.WriteLine();
71 Console.WriteLine();
72 Console.WriteLine("=========================================================================");
73 Console.WriteLine();
74 }
75 }
76 }
77 }