7일차 Switch 문의 사용 (4)

Console Programming/C# Console 2019. 9. 26. 09:52
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using System;
 
namespace Syntax20
{
    class Program
    {
        static void Main(string[] args)
        {
            
            int input = int.Parse(Console.ReadLine());
 
            switch (input)
            {
                case 1:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 3:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 5:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 7:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 8:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 10:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 12:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 4:
                    {
                        Console.WriteLine(30);
                        break;
                    }
                case 6:
                    {
                        Console.WriteLine(30);
                        break;
                    }
                case 9:
                    {
                        Console.WriteLine(30);
                        break;
                    }
                case 11:
                    {
                        Console.WriteLine(30);
                        break;
                    }
                case 2:
                    {
                        Console.WriteLine(28);
                        break;
                    }
                case 15:
                    {
                        Console.WriteLine(-1);
                        break;
                    }
                default:
                    {
                        break;
                    }
 
            }
           
        }
    }
}
 
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선택지의 개수가 많아지면 switch 문의 작성이 번거로워진다. 

 

 

 

 

 

같은 결과를 케이스들은 

case 1:

case 3:

이런식으로 묶어서 쓸 수 있다.

 

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using System;
 
namespace Syntax20
{
    class Program
    {
        static void Main(string[] args)
        {
            
            int input = int.Parse(Console.ReadLine());
 
            switch (input)
            {
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                    {
                        Console.WriteLine(31);
                        break;
                    }
                case 4:
                case 6:
                case 9:
                case 11:
                    {
                        Console.WriteLine(30);
                        break;
                    }
                case 2:
                    {
                        Console.WriteLine(28);
                        break;
                    }
                case 15:
                    {
                        Console.WriteLine(-1);
                        break;
                    }
                default:
                    {
                        break;
                    }
 
            }
           
        }
    }
}
 
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