出一个C#面试题给大家做,该怎么解决

出一个C#面试题给大家做
题目要求：

（1）产生本月的月历，参考样式：

C# code

SU MO TU WE TH FR SA
         01 02 03 04
05 06 07 08 09 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30

将结果存入一个字符串里面

框架程序：

C# code

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string calendar = "";
            // 在这里编写代码
            Console.WriteLine(calendar);
        }
    }
}

时间限制 1 小时。

（2）提高版：编写一个产生当年年历的程序。要求排版成 4 x 3 的样式。

------解决方案--------------------

C# code


            string calendar = "";
            // 在这里编写代码
            DateTime now = DateTime.Today;
            DateTime dt1 = new DateTime(now.Year, now.Month, 1);
            DateTime dt2 = dt1.AddMonths(1).AddDays(-1);
            StringBuilder sb = new StringBuilder();
            for (int i = (int)DayOfWeek.Sunday; i <= (int)DayOfWeek.Saturday; i++)
            {
                sb.Append(((DayOfWeek)i).ToString().Substring(0, 2).ToUpper() + " ");
            }
            for (DateTime dt = dt1.AddDays(-(int)now.DayOfWeek); dt <= dt2; dt = dt.AddDays(1))
            {
                if (dt.Month < now.Month)
                    sb.Append("   ");
                else
                    sb.Append(dt.Day.ToString().PadLeft(2, '0') + " ");
                if (dt.DayOfWeek == DayOfWeek.Saturday)
                    sb.AppendLine();
            }
            calendar = sb.ToString();
            Console.WriteLine(calendar);

------解决方案--------------------

方法笨点。。

C# code


  string calendar = "";
            // 在这里编写代码
            DateTime date = DateTime.Now;
            DateTime firstDay = new DateTime(date.Year, date.Month, 1);
            int daysCount = DateTime.DaysInMonth(date.Year, date.Month);
            int weekOfFirstDay = Convert.ToInt32(firstDay.DayOfWeek);
            calendar = "\tSU\tMO\tTU\tWE\tTH\tFR\tSA\n";
            for (int i = 1; i < daysCount + 1; i++)
            {
                if (i == 1)
                {
                    for (int j = 0; j < weekOfFirstDay; j++)
                    {
                        calendar += "\t";
                    }
                }
                string str = i < 10 ? i.ToString().PadLeft(2, '0') : i.ToString();
                calendar += "\t" + str;
                if ((i + weekOfFirstDay) % 7 == 0)
                {
                    calendar += "\n";
                }
            }
            Console.WriteLine(calendar);
            Console.ReadLine();

------解决方案--------------------
拿出手机,调出日历,照着画
Console.WriteLine("SU MO TU WE TH FR SA");
Console.WriteLine("         01 02 03 04");
Console.WriteLine("05 06 07 08 09 10 11");
Console.WriteLine("12 13 14 15 16 17 18");
Console.WriteLine("19 20 21 22 23 24 25");
Console.WriteLine("26 27 28 29 30      ");

临走别忘记淡定的说句,"这公司太弱了,出这么简单的题目,老子来了一次不想来第二次了"

------解决方案--------------------

动动手，写个：

C# code

static void GenerateCalendar(int year, int month)
{
    var num = 7;
    var cols = Enumerable.Range(0, num).ToArray();
    var row = Enumerable.Range(0, num).Select(x => "__").ToArray();
    var begin = new DateTime(year, month, 1);
    var end = begin.AddDays(DateTime.DaysInMonth(year, month) - 1);
    while (begin.Month == end.Month && begin.Day <= end.Day)
    {
        row[(int)begin.DayOfWeek] = begin.Day.ToString("00");
        if ((int)begin.DayOfWeek == cols[cols.Length-1])
        {
            Console.WriteLine(string.Join(" ", row));
            row = Enumerable.Range(0, num).Select(x => "__").ToArray();
        }
        begin = begin.AddDays(1);
    }
    Console.WriteLine(string.Join(" ", row));
}

出一个C#面试题给大家做,该怎么解决

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