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    <p>Looks like the snake game might work. Track a direction vector, and turn right 90 degrees every time you hit a side or a populated square. The tail keeps extending indefinitely :)</p> <p>Edit : Snakey v0.1 in C#. Works for non square grids too ;)</p> <pre><code>using System; using System.Text; namespace ConsoleApplication1 { class Program { public enum Direction { Up, Down, Left, Right } static void Main(string[] args) { int[,] maze; Direction currentDirection = Direction.Right; bool totallyStuck = false; bool complete = false; int currentX = 0; int currentY = 0; int boundX = 4; int boundY = 5; int currentNumber = 1; int stuckCounter = 0; bool placeNumber = true; maze = new int[boundY, boundX]; while ((!totallyStuck) &amp;&amp; (!complete)) { if (placeNumber) { maze[currentY, currentX] = currentNumber; currentNumber++; stuckCounter = 0; } switch (currentDirection) { case Direction.Right: // Noted short Circuit Bool Evan if ((currentX + 1 &lt; boundX) &amp;&amp; (maze[currentY, currentX + 1] == 0)) { placeNumber = true; currentX++; stuckCounter = 0; } else { placeNumber = false; stuckCounter++; } break; case Direction.Left: if ((currentX - 1 &gt;= 0) &amp;&amp; (maze[currentY, currentX - 1] == 0)) { placeNumber = true; currentX--; stuckCounter = 0; } else { placeNumber = false; stuckCounter++; } break; case Direction.Down: if ((currentY + 1 &lt; boundY) &amp;&amp; (maze[currentY + 1, currentX] == 0)) { placeNumber = true; currentY++; stuckCounter = 0; } else { placeNumber = false; stuckCounter++; } break; case Direction.Up: if ((currentY - 1 &gt;= 0) &amp;&amp; (maze[currentY - 1, currentX] == 0)) { placeNumber = true; currentY--; stuckCounter = 0; } else { placeNumber = false; stuckCounter++; } break; } // Is Snake stuck? If so, rotate 90 degs right if (stuckCounter == 1) { switch (currentDirection) { case Direction.Right: currentDirection = Direction.Down; break; case Direction.Down: currentDirection = Direction.Left; break; case Direction.Left: currentDirection = Direction.Up; break; case Direction.Up: currentDirection = Direction.Right; break; } } else if (stuckCounter &gt; 1) { totallyStuck = true; } } // Draw final maze for (int y = 0; y &lt; boundY; y++) { for (int x = 0; x &lt; boundX; x++) { Console.Write(string.Format("{0:00} ",maze[y, x])); } Console.Write("\r\n"); } } } } </code></pre>
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    1. COA pseudocode algorithm for that would be nice
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      1. USfredley
    2. COThis can't work. If you start from the inside and work outward, you'll never hit an occupied square. If you start from the outside and work inside, you'll also never hit an occupied square. And if you start with an empty grid, you'll go in a straight line forever regardless.
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      1. USmeagar
    3. COUnless you counted the number of numbers you had and build your grid based on that info.
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      1. USBlair McMillan
 

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