【Language】C#之旅_③_條件陳述式

namespace ConsoleApplication1
{
    class Program
    {
        enum hobby { reading,writing,singing,dancing }
        static void Main(string[] args)
        {
                     /*條件陳述式*/
            int month;
            month=0;
            /*if 語句*/
                //①文法—if(布爾值) 程式語句
                if (month < 1)
                {
                     Console.WriteLine("月份不存在!");
                }
                //②文法—if(布爾值) 程式語句a else 程式語句b
                month++;
                if (month == 1)
                {
                    Console.WriteLine("現在是一月");
                    month++;
                }
                else
                {
                    Console.WriteLine("月份不存在!");
                }
                //③文法—if(布爾值) 程式語句a else if 程式語句b else if 程式語句c … …
             
                if (month == 1)
                {
                    Console.WriteLine("現在是一月");
                }
                else if (month == 2)
                {
                    Console.WriteLine("現在是二月");
                }
                else if (month == 3)
                {
                    Console.WriteLine("現在是三月");
                }
                else
                {
                    Console.WriteLine("月份不存在!");
                }
                //當然還可以同時使用多個布爾值或者是上一小節的三元運算子(?:)

            /*switch 語句*/
                //文法：
                //switch (參數)
                //  {
                //      case 對應的參數值a:操作a;break;
                //      case 對應的參數值b:操作b;break;
                //      default:預設操作c;break;
                //  }
                int x=0;
                switch (x)
                {
                    case 0: Console.WriteLine("x的值是：0"); break;
                    case 1: Console.WriteLine("x的值是：1"); break;
                    default: Console.WriteLine("預設執行該情況"); break;
                }

                hobby myHobby = hobby.dancing;//枚舉類型的使用——沒忘了在開頭定義的枚舉類型的參數hobby吧？
                switch (myHobby)
                {
                    case hobby.dancing: Console.WriteLine("我喜歡的是跳舞吖！"); break;
                    case hobby.reading: Console.WriteLine("我喜歡的是讀書啊！"); break;
                    case hobby.singing: Console.WriteLine("我喜歡的是唱歌啊！"); break;
                    case hobby.writing: Console.WriteLine("我喜歡的是寫作哦！"); break;
                    default: Console.WriteLine("這些都不是我的愛好！"); break;
                }
               
                switch (myHobby)    //組合case的使用
                {
                    case hobby.dancing:
                    case hobby.reading: Console.WriteLine("我喜歡的是讀書and跳舞啊！"); break;
                    case hobby.singing:
                    case hobby.writing: Console.WriteLine("我喜歡的是寫作and唱歌哦！"); break;
                    default: Console.WriteLine("這些都不是我的愛好！"); break;
                }
  
            Console.ReadKey();//等待user輸入
        }
    }
}