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PORecursive backtracking returning updated value
 

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    <p>I'm creating a program designed to recursively navigate a maze. The code:</p> <pre><code>public static boolean traverse(int maze[][], coordinate start) { //recursion: traverse(maze, updated coordinates) if(maze[start.y+1][start.x] == 2 || maze[start.y-1][start.x] == 2 || maze[start.y][start.x+1] == 2 || maze[start.y][start.x - 1] == 2) { display(maze); System.out.println("DONE"); return true; } else { if(north(maze, start) == true) { maze[start.y-1][start.x] = 4; display(maze); coordinate temp = start; temp.y--; if (traverse(maze, temp) == false) { maze[start.y][start.x] = 3; } } if(west(maze, start) == true) { maze[start.y][start.x-1] = 4; display(maze); coordinate temp = start; temp.x--; if (traverse(maze, temp) == false) { maze[start.y][start.x] = 3; } } if(south(maze, start) == true) { maze[start.y+1][start.x] = 4; display(maze); coordinate temp = start; temp.y++; if (traverse(maze, temp) == false) { maze[start.y][start.x] = 3; } } if(east(maze, start) == true) { maze[start.y][start.x+1] = 4; display(maze); coordinate temp = start; temp.x++; if (traverse(maze, temp) == false) { maze[start.y][start.x] = 3; } } } return false; } </code></pre> <p>However whenever I reach a dead end, it doesn't backtrack. When I debug, it shows that my start values are fixated on staying at my dead end space when the program returns from the recursion or "backtracks".</p> <p>For example:</p> <pre><code>1 1 1 1 1 1 4 4 4 1 1 9 1 4 1 1 1 1 4 1 1 4 4 4 1 1 4 1 0 1 1 4 1 0 1 1 1 1 2 1 </code></pre> <p>9 is my starting point. 2 is my exit. 4 is my path. 1 represents the walls. When I reach a dead end (in this case row 7, column 2). My position be would equal to that dead end space throughout the rest of the program. Why's that?</p>
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