SM1, C# - rextester

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//4.1 Composition

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

namespace snake
{

public class Snake

{

static void Main(string[] args);

struct Location // coordinate structure for our snake
        {
            public int X, Y;

public Location(int x, int y)
            {
                this.X = x;
                this.Y = y;
            }
        };
        public enum Direction { Left, Right, Up, Down }; // determine possible directions
        public Direction direction; // create direction field

private static List<Location> snake = new List<Location>(); // list of snake part locations
        public Apple apple = new Apple();

public Snake() // constructor
        {
            Location head = new Location(40, 12);
            snake.Add(head);
            direction = Direction.Right; // set default direction

Thread thread = new Thread(Move); // create a new thread
            thread.IsBackground = true; // run thread in the background
            thread.Start(); // start thread    
        }

public void Move() // moving the snake
        {
            string sprite = "";
            while (true)
            {
                Location next = snake[0]; // make snake head editable

switch (direction) // determine movement of head based on direction
                {
                    case Direction.Left:
                        if (next.X > 0) { next.X--; sprite = ">"; }
                        else { next.X = 79; }
                        break;
                    case Direction.Right:
                        if (next.X < 79) { next.X++; sprite = "<"; }
                        else { next.X = 0; }
                        break;
                    case Direction.Up:
                        if (next.Y > 0) { next.Y--; sprite = "v"; }
                        else { next.Y = 24; }
                        break;
                    case Direction.Down:
                        if (next.Y < 24) { next.Y++; sprite = "^"; }
                        else { next.Y = 0; }
                        break;
                }

Console.SetCursorPosition(snake[snake.Count - 1].X, snake[snake.Count - 1].Y);
                Console.Write(" "); // remove the last location of the last segment of the snake
                snake[0] = next; // store the new location back into the list

Console.SetCursorPosition(snake[0].X, snake[0].Y); // position of head
                Console.Write(sprite); // output directional sprite

snake.Insert(0, next); // add a new snake segment at the front of the snake

if (snake[0].X == apple.X() && snake[0].Y == apple.Y())
                {
                    // generate new location for apple
                    apple.randomApple();
                }
                else
                {
                    snake.RemoveAt(snake.Count - 1);
                }
                Thread.Sleep(200); // pause for 0.3 seconds
            }
        }
    }
}

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