布莱恩的大脑

选一种语言就能看到代码

DEAD, ON, DYING = 0, 1, 2


def on_neighbors(cells, w, h, x, y):
    total = 0
    for dy in (-1, 0, 1):
        for dx in (-1, 0, 1):
            if dx == 0 and dy == 0:
                continue
            if cells[(y + dy) % h * w + (x + dx) % w] == ON:
                total += 1
    return total


def brains_step(cells, w, h):
    out = [DEAD] * (w * h)
    for y in range(h):
        for x in range(w):
            state = cells[y * w + x]
            if state == ON:
                out[y * w + x] = DYING
            elif state == DEAD and on_neighbors(cells, w, h, x, y) == 2:
                out[y * w + x] = ON
    return out

const DEAD = 0;
const ON = 1;
const DYING = 2;

function onNeighbors(cells, w, h, x, y) {
  let total = 0;
  for (let dy = -1; dy <= 1; dy++) {
    for (let dx = -1; dx <= 1; dx++) {
      if (dx === 0 && dy === 0) continue;
      const at = ((y + dy + h) % h) * w + ((x + dx + w) % w);
      if (cells[at] === ON) total++;
    }
  }
  return total;
}

function brainsStep(cells, w, h) {
  const out = new Uint8Array(w * h);
  for (let y = 0; y < h; y++) {
    for (let x = 0; x < w; x++) {
      const state = cells[y * w + x];
      if (state === ON) out[y * w + x] = DYING;
      else if (state === DEAD && onNeighbors(cells, w, h, x, y) === 2) {
        out[y * w + x] = ON;
      }
    }
  }
  return out;
}

#define DEAD 0
#define ON 1
#define DYING 2

static int on_neighbors(const char cells[], int w, int h, int x, int y) {
    int total = 0;
    for (int dy = -1; dy <= 1; dy++) {
        for (int dx = -1; dx <= 1; dx++) {
            if (dx == 0 && dy == 0) continue;
            int at = ((y + dy + h) % h) * w + (x + dx + w) % w;
            if (cells[at] == ON) total++;
        }
    }
    return total;
}

void brains_step(const char cells[], char out[], int w, int h) {
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            int state = cells[y * w + x];
            int live = on_neighbors(cells, w, h, x, y);
            char next = DEAD;
            if (state == ON) next = DYING;
            else if (state == DEAD && live == 2) next = ON;
            out[y * w + x] = next;
        }
    }
}

enum Cell { DEAD = 0, ON = 1, DYING = 2 };

static int on_neighbors(const std::vector<char>& cells, int w, int h,
                        int x, int y) {
    int total = 0;
    for (int dy = -1; dy <= 1; dy++) {
        for (int dx = -1; dx <= 1; dx++) {
            if (dx == 0 && dy == 0) continue;
            int at = ((y + dy + h) % h) * w + (x + dx + w) % w;
            if (cells[at] == ON) total++;
        }
    }
    return total;
}

std::vector<char> brains_step(const std::vector<char>& cells, int w, int h) {
    std::vector<char> out(cells.size(), DEAD);
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            int state = cells[y * w + x];
            if (state == ON) out[y * w + x] = DYING;
            else if (state == DEAD && on_neighbors(cells, w, h, x, y) == 2)
                out[y * w + x] = ON;
        }
    }
    return out;
}

const int Dead = 0;
const int On = 1;
const int Dying = 2;

static int OnNeighbors(byte[] cells, int w, int h, int x, int y) {
    int total = 0;
    for (int dy = -1; dy <= 1; dy++) {
        for (int dx = -1; dx <= 1; dx++) {
            if (dx == 0 && dy == 0) continue;
            int at = ((y + dy + h) % h) * w + (x + dx + w) % w;
            if (cells[at] == On) total++;
        }
    }
    return total;
}

static byte[] BrainsStep(byte[] cells, int w, int h) {
    byte[] next = new byte[w * h];
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            int state = cells[y * w + x];
            if (state == On) next[y * w + x] = Dying;
            else if (state == Dead && OnNeighbors(cells, w, h, x, y) == 2) {
                next[y * w + x] = On;
            }
        }
    }
    return next;
}

static final int DEAD = 0;
static final int ON = 1;
static final int DYING = 2;

static int onNeighbors(byte[] cells, int w, int h, int x, int y) {
    int total = 0;
    for (int dy = -1; dy <= 1; dy++) {
        for (int dx = -1; dx <= 1; dx++) {
            if (dx == 0 && dy == 0) continue;
            int at = ((y + dy + h) % h) * w + (x + dx + w) % w;
            if (cells[at] == ON) total++;
        }
    }
    return total;
}

static byte[] brainsStep(byte[] cells, int w, int h) {
    byte[] out = new byte[w * h];
    for (int y = 0; y < h; y++) {
        for (int x = 0; x < w; x++) {
            int state = cells[y * w + x];
            if (state == ON) out[y * w + x] = DYING;
            else if (state == DEAD && onNeighbors(cells, w, h, x, y) == 2) {
                out[y * w + x] = ON;
            }
        }
    }
    return out;
}