Game of life

game_of_life.cpp

#include <iostream>
#include <chrono>
#include <thread>
#include <cstdlib>
#include <ctime>
#include <cstring>

using namespace std;

#define W 120
#define H 40
#define WTIME 42000

#define loop(a, b) for (int a = 0; a < (b); a++)

int m[H][W];
int nmap[8][2] = {{1, -1}, {1, 0}, {1, 1}, {0, -1}, {0, 1}, {-1, -1}, {-1, 0}, {-1, 1}};
int colors[6] = {103, 43, 105, 45, 101, 41};

void print() {
    loop(y, H) {
        loop(x, W) {
            if (m[y][x]) cout << "\033[" << colors[m[y][x] - 1] << "m \e[0m";
            else cout << ' ';
        }
        cout << endl;
    }
}

void clr() {
    loop(i, W * (H + 1)) cout << "\e[A";
}

void step() {
    int temp[H][W];
    loop(y, H) loop(x, W) {
        int total = 0;
        loop(n, 8) {
            int ny = (y + nmap[n][0] + H) % H;
            int nx = (x + nmap[n][1] + W) % W;
            if (m[ny][nx] > 0) total++;
        }

        temp[y][x] = m[y][x] ? min(6, m[y][x] + 1) : 0;
        if (m[y][x]) {
            if (total < 2 || total > 3) temp[y][x] = 0;
        } else if (total == 3) temp[y][x] = 1;
    }

    memcpy(m, temp, sizeof(m));
}

int main() {
    chrono::microseconds wait(WTIME);
    srand(time(0));

    loop(y, H) loop(x, W) m[y][x] = rand() % 10 > 2 ? 1 : 0;

    for (;;) {
        clr();
        step();
        print();
        std::this_thread::sleep_for(wait);
    }

    return 0;
}