usaa21/sk1a/maze.c

#include <stdio.h>
#include <string.h>
#include "maze.h"
#include <assert.h>

int issafe(char* maze, int x, int y, int size) {
    if ((x >= 0 && x < size) && (y >= 0 && y < size) && maze[x * size + y] == ' '){
        return 1;
    }
    return 0;
}

int backtracking(char* maze, int x, int y, int size){
    if(x == size - 1 && y == size - 1 && maze[x * size + y] == ' '){
        maze[x * size + y] = '*';
        return 1;
    }

    if(issafe(maze, x, y, size) == 1) {
        maze[x * size + y] = '*';

        if (backtracking(maze, x, y + 1, size) == 1) {
            return 1;
        }
        if (backtracking(maze, x + 1, y, size) == 1) {
            return 1;
        }
        if (backtracking(maze, x - 1, y, size) == 1) {
            return 1;
        }
        if (backtracking(maze, x, y - 1, size) == 1) {
            return 1;
        }
        maze[x * size + y] = ' ';
    }
    return 0;
}

int solve_maze(char* maze, int size) {
    if (maze[0] == '*'){
        assert(maze[0] == '*');
        maze[0] = ' ';
    }
    int x,y = 0;
    while(x * size + y <= size*size - 1 ){
        printf("%d\n%d", x * size + y, y);
        //issafe(maze, x, y, size);
        if (maze[x * size + y + 1] == ' ' /*&& y != 5*/){
            assert(maze[x * size + y + 1] == ' ');
            maze[x * size + y + 1] = '*';
            y++;

        }
        if (maze[(x + 1) * size + y] == ' ' /*&& x != 5*/){
            assert(maze[(x + 1) * size + y] == ' ');
            maze[(x + 1) * size + y] = '*';
            x++;

        }
        if (maze[x * size + y - 1] == ' ' && y != 0){
            assert(maze[x * size + y - 1] == ' ');
            maze[x * size + y - 1] = '*';
            y--;

        }
        if (maze[(x - 1) * size + y] == ' ' /*&& x != 0*/){
            assert(maze[(x - 1) * size + y] == ' ');
            maze[(x - 1) * size + y] = '*';
            x--;

        }
        else{
            backtracking(maze,x , y, size);
        }
    }
return 1;
}