Conway's Game of Life: Difference between revisions

Play game of life on your console: <code>gcc -std=c99 -Wall game.c; ./a.out [width] [height]</code>

<lang C>#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#define for_x for (int x = 0; x < w; x++)

#define for_y for (int y = 0; y < h; y++)

#define for_xy for_x for_y

void show(void *u, int w, int h)

{

int (*univ)[w] = u;

printf("\033[H");

for_y {

for_x printf(univ[y][x] ? "\033[07m \033[m" : " ");

printf("\033[E");

}

fflush(stdout);

}

void evolve(void *u, int w, int h)

{

unsigned (*univ)[w] = u;

unsigned new[h][w];

for_y for_x {

int n = 0;

for (int y1 = y - 1; y1 <= y + 1; y1++)

for (int x1 = x - 1; x1 <= x + 1; x1++)

if (univ[(y1 + h) % h][(x1 + w) % w])

n++;

if (univ[y][x]) n--;

new[y][x] = (n == 3 || (n == 2 && univ[y][x]));

}

for_y for_x univ[y][x] = new[y][x];

}

void game(int w, int h)

{

unsigned univ[h][w];

for_xy univ[y][x] = rand() < RAND_MAX / 10 ? 1 : 0;

while (1) {

show(univ, w, h);

evolve(univ, w, h);

usleep(200000);

}

}

int main(int c, char **v)

{

int w = 0, h = 0;

if (c > 1) w = atoi(v[1]);

if (c > 2) h = atoi(v[2]);

if (w <= 0) w = 30;

if (h <= 0) h = 30;

game(w, h);

}</lang>

Also see [[Conway's Game of Life/C]]