どう書く?orgのお題、文字列の八方向検索投稿用に書きました。
using System.Collections.Generic; using System.Text; using Microsoft.VisualBasic; namespace どう書く_org文字列の八方向検索 { class Program { static string search; static List<string> list; static void Main(string[] args) { string sample = @"リオウウリウ ウオリウオリ オリリオリウ リリオオウオ"; search = "ウオリ"; char sp = new char { '\n' }; int width = sample.Split(sp)[0].Length; int height = sample.Split(sp).Length; list = new List<string>(sample.Split(sp)); for(int y = 0; y < list.Count; y++) { for(int x = 0; x < list[y].Length; x++) { if(list[y][x] == search[0]) { if(E(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "右"); } if(W(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "左"); } if(S(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "下"); } if(N(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "上"); } if(NE(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "右上"); } if(SE(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "右下"); } if(NW(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "左上"); } if(SW(x, y) == search) { Console.WriteLine("(" + x + "," + y + ")" + "," + "左下"); } } } } Console.ReadLine(); } static string E(int x, int y) { try { return list[y].Substring(x, search.Length); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string W(int x, int y) { try { return Strings.StrReverse(E(x - search.Length + 1, y)); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string S(int x, int y) { try { StringBuilder strb = new StringBuilder(); for(int i = 0; i < search.Length; i++) { strb.Append(list[y + i][x]); } return strb.ToString(); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string N(int x, int y) { try { return Strings.StrReverse(S(x, y - search.Length + 1)); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string SE(int x, int y) { try { StringBuilder strb = new StringBuilder(); for(int i = 0; i < search.Length; i++) { strb.Append(list[y + i][x + i]); } return strb.ToString(); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string NW(int x, int y) { try { return Strings.StrReverse(SE(x - search.Length + 1, y - search.Length + 1)); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string NE(int x, int y) { try { StringBuilder strb = new StringBuilder(); for(int i = 0; i < search.Length; i++) { strb.Append(list[y - i][x + i]); } return strb.ToString(); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } static string SW(int x, int y) { try { return Strings.StrReverse(NE(x - search.Length + 1, y + search.Length - 1)); } catch(ArgumentOutOfRangeException) { return ""; } catch(IndexOutOfRangeException) { return ""; } } } }