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  1. #include <stdio.h>
  2.  
  3. void printMaze(char maze[][100],
  4.                int rows,
  5.                int columns)
  6. {
  7.     for (int row = 0; row < rows; ++row)
  8.     {
  9.         for (int column = 0; column < columns; ++column)
  10.         {
  11.             printf("%c ", maze[row][column]);
  12.         }
  13.  
  14.         puts("");
  15.     }
  16.  
  17.     puts("");
  18. }
  19.  
  20. int mazeTraverse(char maze[][100],
  21.                  int rows,
  22.                  int columns,
  23.                  int row,
  24.                  int column)
  25. {
  26.     if (row < 0 || row >= rows ||
  27.         column < 0 || column >= columns)
  28.     {
  29.         return 1;
  30.     }
  31.  
  32.     if (maze[row][column] != '.')
  33.     {
  34.         return 0;
  35.     }
  36.  
  37.     maze[row][column] = 'X';
  38.  
  39.     if (mazeTraverse(maze,
  40.                      rows,
  41.                      columns,
  42.                      row,
  43.                      column + 1))
  44.     {
  45.         return 1;
  46.     }
  47.  
  48.     if (mazeTraverse(maze,
  49.                      rows,
  50.                      columns,
  51.                      row + 1,
  52.                      column))
  53.     {
  54.         return 1;
  55.     }
  56.  
  57.     if (mazeTraverse(maze,
  58.                      rows,
  59.                      columns,
  60.                      row,
  61.                      column - 1))
  62.     {
  63.         return 1;
  64.     }
  65.  
  66.     if (mazeTraverse(maze,
  67.                      rows,
  68.                      columns,
  69.                      row - 1,
  70.                      column))
  71.     {
  72.         return 1;
  73.     }
  74.  
  75.     maze[row][column] = '.';
  76.  
  77.     return 0;
  78. }
  79.  
  80. int main(void)
  81. {
  82.     int rows;
  83.     int columns;
  84.  
  85.     printf("Enter number of rows: ");
  86.     scanf("%d", &rows);
  87.  
  88.     printf("Enter number of columns: ");
  89.     scanf("%d", &columns);
  90.  
  91.     char maze[100][100];
  92.  
  93.     printf("Enter the maze:\n");
  94.  
  95.     for (int row = 0; row < rows; ++row)
  96.     {
  97.         for (int column = 0; column < columns; ++column)
  98.         {
  99.             scanf(" %c", &maze[row][column]);
  100.         }
  101.     }
  102.  
  103.     printf("\nMaze before traversal:\n\n");
  104.     printMaze(maze, rows, columns);
  105.  
  106.     if (mazeTraverse(maze,
  107.                      rows,
  108.                      columns,
  109.                      1,
  110.                      1))
  111.     {
  112.         printf("The maze was solved.\n");
  113.     }
  114.     else
  115.     {
  116.         printf("No path was found.\n");
  117.     }
  118.  
  119.     printf("\nMaze after traversal:\n\n");
  120.     printMaze(maze, rows, columns);
  121.  
  122.     return 0;
  123. }
Success #stdin #stdout 0s 5288KB
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stdin
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Standard input is empty
stdout
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Enter number of rows: Enter number of columns: Enter the maze:

Maze before traversal:


The maze was solved.

Maze after traversal:
https://ideone.com/PTBXYs
language:
C (gcc 8.3)
created:
9 hours ago
visibility:
public

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