C++の練習用に書いたライフゲームです。トーラス上の盤面でエミュレートしています。C++11仕様のコンパイルをしなければならないこと、ひたすら端末に出力し続けることに注意が必要です。

lifegame.cpp

/* License
  The MIT License (MIT)
  Copyright (c) 2014 SAKATA Sinji
*/

/* Attention
  This program should be compiled by C++11.
  Example:$ g++ -std=c++11 lifegame.cpp
*/

#include <iostream>
#include <random>
#include <unistd.h>
using namespace std;

class Cell{
private:
   int x, y;
   bool state, beforeState;
   static Cell* headCell;

public:
   static int CELL_WIDTH;
   static int CELL_HEIGHT;
   static int INITIAL_ALIVE;
   Cell();
   void updateState();
   void setPosition(int y, int x){ this->y = y; this->x = x;}
   bool getState(){ return state; }
   void setState(bool state){ this->state = state; }
   bool getBeforeState(){ return beforeState; }
   bool setBeforeState(bool state){ beforeState = state; }
   static Cell* getCell(int y, int x);
   static void setHeadCell(Cell* head){ headCell = head; }
};

Cell* Cell::headCell;
int Cell::CELL_WIDTH;
int Cell::CELL_HEIGHT;
int Cell::INITIAL_ALIVE;

Cell::Cell()
{
   state = false;
   beforeState = false;
}

void Cell::updateState()
{
  int aliveCell = 0;

  for(int i = -1; i <= 1; i++){
    for(int j = -1; j <= 1; j++){
      if(i == 0 && j == 0){
        continue;
      }

      if(getCell(y+i, x+j)->getBeforeState()){
        aliveCell++;
      }
    }
  }

  if(aliveCell == 3){
    setState(true);
  } else if(aliveCell == 2 && getBeforeState()){
    setState(true);
  } else{
    setState(false);
  }
}

Cell* Cell::getCell(int y, int x)
{
  int diff_height = Cell::CELL_WIDTH * ((Cell::CELL_HEIGHT + y) % Cell::CELL_HEIGHT);
  int diff_width = (Cell::CELL_WIDTH + x) % Cell::CELL_WIDTH;

  return headCell + diff_height + diff_width;
}

int main()
{
  cout << "CELL_WIDTH:";
  cin >> Cell::CELL_WIDTH;
  cout << "CELL_HEIGHT:";
  cin >> Cell::CELL_HEIGHT;
  cout << "INITIAL_ALIVE:";
  cin >> Cell::INITIAL_ALIVE;

  Cell field[Cell::CELL_HEIGHT][Cell::CELL_WIDTH];
  Cell::setHeadCell( (Cell*)field );

  for(int y = 0; y < Cell::CELL_HEIGHT; y++){
    for(int x = 0; x < Cell::CELL_WIDTH; x++){
      Cell::getCell(y, x)->setPosition(y, x);
    }
  }

  // set initial alive sell
  std::random_device rd;
  mt19937 rndm(rd());
  const int MAX_INITIAL_ALIVE = (Cell::CELL_HEIGHT / 3) * (Cell::CELL_WIDTH / 3);
  for(int i = 0; i < Cell::INITIAL_ALIVE && i < MAX_INITIAL_ALIVE;){
    int y = rndm() % (Cell::CELL_HEIGHT / 3) + (Cell::CELL_HEIGHT / 3);
    int x = rndm() % (Cell::CELL_WIDTH / 3) + (Cell::CELL_WIDTH / 3);
    Cell* cell = Cell::getCell(y, x);

    if( !(cell->getState()) ){
      cell->setState(true);
      i++;
    }
  }

  while(true){
    // print field
    for(int y = 0; y < Cell::CELL_HEIGHT; y++){
      for(int x = 0; x < Cell::CELL_WIDTH; x++){
        Cell* cell = Cell::getCell(y, x);
        if(cell->getState()){
          cout << "0";
        } else{
          cout << ".";
        }
        cell->setBeforeState( cell->getState() );
      }
      cout << endl;
    }
    cout << "-----" << endl;

    // update field
    for(int y = 0; y < Cell::CELL_HEIGHT; y++){
      for(int x = 0; x < Cell::CELL_WIDTH; x++){
        Cell::getCell(y, x)->updateState();
      }
    }

    usleep(600000);
  }
}