diff options
Diffstat (limited to 'drunkard.c')
-rw-r--r-- | drunkard.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/drunkard.c b/drunkard.c new file mode 100644 index 0000000..2427249 --- /dev/null +++ b/drunkard.c @@ -0,0 +1,77 @@ +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <time.h> + +#define HEIGHT 50 +#define WIDTH 50 +#define MAX_STEPS 50 +#define NUM_WALKERS 100 + +enum direction { + UP, + LEFT, + RIGHT, + DOWN, + NUM_DIRS, +}; + +struct point { + int x; + int y; +}; + +int main(void) +{ + bool map[HEIGHT][WIDTH]; + for (int i = 0; i < HEIGHT; ++i) { + for (int j = 0; j < WIDTH; ++j) { + map[i][j] = false; + } + } + + int start_x = WIDTH / 2; + int start_y = HEIGHT / 2; + + int open_tiles = 1; + struct point open[HEIGHT * WIDTH]; + struct point p = {.x = start_x, .y = start_y}; + open[0] = p; + + srand(time(NULL)); + + for (int i = 0; i < NUM_WALKERS; ++i) { + struct point curr_point = open[rand() % open_tiles]; + int x_pos = curr_point.x; + int y_pos = curr_point.y; + + for (int j = 0; j < MAX_STEPS && x_pos < WIDTH && x_pos >= 0 && + y_pos < HEIGHT && y_pos >= 0; + ++j) { + if (!map[y_pos][x_pos]) { + map[y_pos][x_pos] = true; + struct point p = {.x = x_pos, .y = y_pos}; + open[open_tiles++] = p; + } + enum direction dir = rand() % NUM_DIRS; + switch (dir) { + case UP : --y_pos; break; + case LEFT : --x_pos; break; + case RIGHT : ++x_pos; break; + case DOWN : ++y_pos; break; + default : exit(EXIT_FAILURE); // should not occur + } + } + } + + for (int i = 0; i < HEIGHT; ++i) { + for (int j = 0; j < WIDTH; ++j) { + if (map[i][j]) { + printf("#"); + } else { + printf("."); + } + } + printf("\n"); + } +} |