C# Random 클래스 (feat 중복제거)

Random 매서드

using System;
using System.Diagnostics;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            Random rand = new Random();
            
            //Next();
            int iNext = rand.Next(); //0 <= value < MaxValue
            Debug.WriteLine(iNext); //output 878041336

            //Next(min, max);
            int iminmax = rand.Next(1,2); //min <= value < max
            Debug.WriteLine(iminmax); //output 29

            //Next(max);
            int imax = rand.Next(100); //0 <= value < max
            Debug.WriteLine(imax); //output 37

            //Next Bytes(byte[] buffer);
            byte[] buffer = new byte[3]; //0 <= value < MaxValue
            rand.NextBytes(buffer);
            foreach(var buff in buffer) 
                Debug.WriteLine(buff); //output 103, 115, 123

            //NextDouble();
            double drandom = rand.NextDouble(); //0.0 <= value < 1.0
            Debug.WriteLine(drandom); //output 0.664724550053815
        }
    }
}

 

중복 제거 (예제 로또 발생기)

using System;
using System.Collections.Generic;
using System.Diagnostics;

namespace ConsoleApp8
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> lotto = new List<int>();
            int iSelect;
            for(int i=0; i<6; i++) //필요한 갯수 입력 필요, 6번
            {
                do
                {
                    iSelect = new Random().Next(1,46); //범위 입력 필요, 1<= value < 46
                } 
                while (lotto.Contains(iSelect));
                
                lotto.Add(iSelect);
                Debug.WriteLine(lotto[i]); //output 39 35 7 44 15 8
            }
        }
    }
}