#include <SFML/Graphics.hpp>
#include <time.h>
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
#define WINDOW_TITLE "Life Game"
#define CELL_SIZE 5
#define MAP_WIDTH WINDOW_WIDTH/CELL_SIZE
#define MAP_HEIGHT WINDOW_HEIGHT/CELL_SIZE
#define FPS 22

int main()
{
         srand(time(NULL)); //Для рандома
         sf::RenderWindow window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), WINDOW_TITLE); //Создаём окно
         window.setFramerateLimit(FPS);
         while (window.isOpen())
         {
             sf::Event event;
             while (window.pollEvent(event))
             {
                 if (event.type == sf::Event::Closed)
                     window.close();
             }
             window.clear();
...
             window.display();
         }
      return 0;
}

bool Generation[MAP_WIDTH][MAP_HEIGHT];

bool OldGeneration[MAP_WIDTH][MAP_HEIGHT];

void Generate()
{
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        if(rand()%10 == 1)
        {
         Generation[x][y] = OldGeneration[x][y] = true;
        }
        else
        {
         Generation[x][y] = OldGeneration[x][y] = false;
        }
       }
      }
}

void Update()
{
      UpdateOldGeneration();
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        char cellsCount = GetCellsCount(x,y);
        if(OldGeneration[x][y] == false)
        {
         if(cellsCount == 3)
         {
          Generation[x][y] = true;
         }
        }
        else
        {
         if((cellsCount < 2)||(cellsCount > 3))
         {
          Generation[x][y] = false;
         }
        }
       }
      }
}

char GetCellsCount(char x, char y)
{
      return GetCell(x-1,y)+GetCell(x-1,y-1)+GetCell(x,y-1)+GetCell(x+1,y-1)+
       GetCell(x+1,y)+GetCell(x+1,y+1)+GetCell(x,y+1)+GetCell(x-1,y+1);
}

char GetCell(char x, char y)
{
      if((x < 0)||(x > MAP_WIDTH - 1)||(y < 0)||(y > MAP_HEIGHT - 1))
      {
       return 0;
      }
      return (char)OldGeneration[x][y];
}  

#include <SFML/Graphics.hpp>
#include <time.h>
#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480
#define WINDOW_TITLE "Life Game"
#define CELL_SIZE 5
#define MAP_WIDTH WINDOW_WIDTH/CELL_SIZE
#define MAP_HEIGHT WINDOW_HEIGHT/CELL_SIZE
#define FPS 22

bool Generation[MAP_WIDTH][MAP_HEIGHT];
bool OldGeneration[MAP_WIDTH][MAP_HEIGHT];

void Generate()
{
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        if(rand()%10 == 1)
        {
         Generation[x][y] = OldGeneration[x][y] = true;
        }
        else
        {
         Generation[x][y] = OldGeneration[x][y] = false;
        }
       }
      }
}

void UpdateOldGeneration()
{
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        OldGeneration[x][y] = Generation[x][y];
       }
      }
}

char GetCell(char x, char y)
{
      if((x < 0)||(x > MAP_WIDTH - 1)||(y < 0)||(y > MAP_HEIGHT - 1))
      {
       return 0;
      }
      return (char)OldGeneration[x][y];
}

char GetCellsCount(char x, char y)
{
      return GetCell(x-1,y)+GetCell(x-1,y-1)+GetCell(x,y-1)+GetCell(x+1,y-1)+
       GetCell(x+1,y)+GetCell(x+1,y+1)+GetCell(x,y+1)+GetCell(x-1,y+1);
}

void Update()
{
      UpdateOldGeneration();
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        char cellsCount = GetCellsCount(x,y);
        if(OldGeneration[x][y] == false)
        {
         if(cellsCount == 3)
         {
          Generation[x][y] = true;
         }
        }
        else
        {
         if((cellsCount < 2)||(cellsCount > 3))
         {
          Generation[x][y] = false;
         }
        }
       }
      }
}

void Draw(sf::RenderWindow* window, sf::RectangleShape* rectangle)
{
      for(int y = 0; y < MAP_HEIGHT; y++)
      {
       for(int x = 0; x < MAP_WIDTH; x++)
       {
        if(Generation[x][y])
        {
         rectangle->setPosition(x*CELL_SIZE, y*CELL_SIZE);
         window->draw(*rectangle);
        }
       }
      }
}

int main()
{
      srand(time(NULL));
      sf::RenderWindow window(sf::VideoMode(WINDOW_WIDTH, WINDOW_HEIGHT), WINDOW_TITLE);
      window.setFramerateLimit(FPS);
      sf::RectangleShape rectangle;
      rectangle.setFillColor(sf::Color(250,50,50));
      rectangle.setSize(sf::Vector2f(CELL_SIZE,CELL_SIZE));
      Generate();
         while (window.isOpen())
         {
             sf::Event event;
             while (window.pollEvent(event))
             {
                 if (event.type == sf::Event::Closed)
                     window.close();
             }
       if(sf::Keyboard::isKeyPressed(sf::Keyboard::R))
       {
        Generate();
       }
       Update();
             window.clear();
       Draw(&window,&rectangle);
             window.display();
         }
      return 0;
}