[2015][Homework]Team03 - Hw01

namespace HW1
{
    class Program
    {
        static void part1()
        {
            int first, second, third,num;
            for (int i = 100; i < 1000; i++)
            {
                first = i / 100;
                second = i / 10 % 10;
                third = i % 10;
                num = first * first * first + second * second * second + third * third * third;
                if (i == num)
                    Console.WriteLine(i);
            }
        }
        static bool part2(int year)//閏年 回傳True
        {
            if (((year % 400) == 0) || ((year % 4 == 0) && (year % 100 != 0))) return true;
            else return false;
        }
        static int part3(int year, int month)
        { 
            if (month != 2)
            {
                int big = 1;
                if (month <= 7)
                {
                    if (month % 2 == 0) big = 0;
                }
                else
                    if (month % 2 == 1) big = 0;
                if (big == 1) return 31;
                else return 30;
            }
            else                    //2月
                if (Program.part2(year)) return 29;
                else return 28;
        }//回傳天數
        static void part4(int year, int month, int day)
        {
            int delta;
            delta = part6(1, 1, 1, year, month, day);
           // delta++;
            if (delta == -1) Console.WriteLine("星期1");
            delta = delta % 7;
            if (delta == 0)
                Console.WriteLine("星期2");
            if (delta == 1)
                Console.WriteLine("星期3");
            if (delta == 2)
                Console.WriteLine("星期4");
            if (delta == 3)
                Console.WriteLine("星期5");
            if (delta == 4)
                Console.WriteLine("星期6");
            if (delta == 5)
                Console.WriteLine("星期天");
            if (delta == 6)
                Console.WriteLine("星期1");
        }
        static bool part5(int year, int month, int day)//有效日期判斷
        {
            if ((month <= 12) && (month >= 1) && ((day <= part3(year, month)) && (day > 0))) return true;
            else return false;
        }
        static int part6(int y1, int m1, int d1,int y2, int m2, int d2)//回傳 兩日相差天數
        {
            int day=0;//offset
            for (int i = y2; i > y1; i--)//年換算
            {
                if (part2(i - 1))
                    day += 366;
                else day += 365;
            }
                for (int i = m2; i > 1; i--)//月換算(轉成1/1)
                    day += part3(y2, i - 1);
                for (int i = m1; i > 1; i--)//月換算(轉成1/1)
                    day -= part3(y1, i - 1);
                    return d2 + day - d1 - 1;
        }

        static void Main(string[] args)
        {
            string cmd;
            int stage,buf,y1,m1,d1,y2,m2,d2;
            while(true)
            {
            #region input
            Console.WriteLine("請輸入要測哪一題:");
            cmd=Console.ReadLine();
            stage = Convert.ToInt32(cmd);
            #endregion
            #region test1
            if (stage == 1)
            {
                part1();
            }
            #endregion
            #region test2
            else if (stage == 2)
            {
                Console.WriteLine("輸入西元年份，讓我幫你算算是不是閏年:");
                cmd = Console.ReadLine();
                buf = Convert.ToInt32(cmd);
                if (part2(buf)) Console.WriteLine("是閏年!");
                else Console.WriteLine("是平年!");
            }
            #endregion
            #region test3
            else if (stage == 3)
            {
                Console.WriteLine("輸入西元年份及月份，讓我幫你算算該月有幾天:");
                Console.WriteLine("請先輸入西元年份:");
                cmd = Console.ReadLine();
                y1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入月份:");
                cmd = Console.ReadLine();
                m1 = Convert.ToInt32(cmd);
                Console.WriteLine(part3(y1, m1));
            }
            #endregion
            #region test4
            else if (stage == 4)
            {
                Console.WriteLine("輸入西元年份及月份和日期，讓我幫你算算是星期幾:");
                Console.WriteLine("請先輸入西元年份:");
                cmd = Console.ReadLine();
                y1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入月份:");
                cmd = Console.ReadLine();
                m1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入日期:");
                cmd = Console.ReadLine();
                d1 = Convert.ToInt32(cmd);
                part4(y1, m1, d1);
            }
            #endregion
            #region test5
            else if (stage == 5)
            {
                Console.WriteLine("輸入西元年份及月份和日期，讓我幫你算算是不是合法日期:");
                Console.WriteLine("請先輸入西元年份:");
                cmd = Console.ReadLine();
                y1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入月份:");
                cmd = Console.ReadLine();
                m1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入日期:");
                cmd = Console.ReadLine();
                d1 = Convert.ToInt32(cmd);
                if (part5(y1, m1, d1)) Console.WriteLine("合法!");
                else
                    Console.WriteLine("不合法!");
            }
            #endregion
            #region test6
            else if (stage == 6)
            {
                Console.WriteLine("輸入兩個西元年份及月份和日期，讓我幫你算算總共差幾天:");
                Console.WriteLine("請先輸入(起始)西元年份:");
                cmd = Console.ReadLine();
                y1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入(起始)月份:");
                cmd = Console.ReadLine();
                m1 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入(起始)日期:");
                cmd = Console.ReadLine();
                d1 = Convert.ToInt32(cmd);
                Console.WriteLine("請先輸入(結束)西元年份:");
                cmd = Console.ReadLine();
                y2 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入(結束)月份:");
                cmd = Console.ReadLine();
                m2 = Convert.ToInt32(cmd);
                Console.WriteLine("請輸入(結束)日期:");
                cmd = Console.ReadLine();
                d2 = Convert.ToInt32(cmd);
                Console.WriteLine(part6(y1, m1, d1, y2, m2, d2));
            }
            #endregion
            else Console.WriteLine("不合法的輸入= =");

        }
        }
    }
}