달팽이 행렬 출력하기

과제 호우 

 

c# 구현

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

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
    
            int n = 4;
            int num = n * n;
            int x =0, y = 0 ;

            int[][] Rarray = new int[n][];
            for (int i = 0; i < n; i++)
            {
                Rarray[i] = new int[n];
            }

            for (int j = n - 1; j > 0 ; j-=2)
            {
                for (int a = 0; a < 4; a++)
                {
                    for (int i = 0; i < j; i++)
                    {
                        switch (a)
                        {
                            case 0:
                                Rarray[y][x] = num;
                                x++;
                                num--;

                                break;
                            case 1:
                                Rarray[y][x] = num;
                                y++;
                                num--;

                                break;
                            case 2:
                                Rarray[y][x] = num;
                                x--;
                                num--;

                                break;
                            case 3:
                                Rarray[y][x] = num;
                                y--;
                                num--;

                                break;
                            default:
                                break;
                        }
                    }
                }
                x++;
                y++;
            }
            if ((n%2) == 1)
            {
                Rarray[y][x] = 1;
            }

            for (int i = 0; i < n; i++)
            {
                for (int j = 0; j < n; j++)
                {
                    Console.Write($"{Rarray[i][j],2}");
                }
                Console.WriteLine("");
            }
        }
    }
}