#include <iostream>
#include <vector>
#include <stdlib.h>
 
using namespace std;
 
struct params_t{
  int world_size; // size of the world (side of the square world)
  double initial_proportion; // initial proportion of living cells
  int max_t; // maximum time for simulation
  int delay; // period in terms of the number of time steps before
             // each display of the world (to make more efficient
             // outputs)
  int num_runs; // number of runs to execute
  int display; // turn on the display-world feature (yes=1, no=0)
};
 
struct stats_t {
  int num_steps;           // the number of time steps
  vector<int> num_living;  // the number of living cells (at a time)
  vector<int> num_dead;    // the number of dead cells (at a time)
};
 
void initialize_world(vector< vector<int> > &world, double p)
{
  int i, j, n;
 
  n = world.size();
 
  // generate each cell to be alive with probability p
 
  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      {
	if (drand48()<p)
	  world[i][j] = 1;
	else
	  world[i][j] = 0;
      }
}
 
int count_neighbors(vector< vector<int> > &world, 
		    int i,
		    int j,
		    int n)
{
  int di, dj;
  int num_neighbors=0;
 
  // note that this assumes wrap-around world, in which
  // the last cell in any row is a neighbor of the very
  // first cell in the row; similarly for the columns
 
  for (di = -1; di <= 1; di++)
    for (dj = -1; dj <= 1; dj++)
      if ((di!=0)||(dj!=0))
	num_neighbors += world[(i+di+n)%n][(j+dj+n)%n];
 
  // return the number of neighbors
 
  return num_neighbors;      
}
 
void process_world(vector< vector<int> > &new_world,
		   vector< vector<int> > &world)
{
  int i, j;
  int n = world.size();
 
  // count neighbors of every cell, and generate the new
  // world using the basic rules of the game of life
  // - living cell dies if less than 2 living neighbors
  // - living cell dies if more than 3 living neighbors
  // - dead cell changes to living if exactly 3 neighbors
  // - otherwise, no change
 
  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      {
	int num_neighbors = count_neighbors(world, i, j, n);
 
	// these conditions implement the rules
 
	if (world[i][j]==1) // living cell
	  {
	    if (num_neighbors<2)
	      new_world[i][j] = 0;   // died because of underpopulation
	    else
	      if (num_neighbors>3)
		new_world[i][j] = 0; // died because of overcrowding
	      else
		new_world[i][j] = 1; // cell goes on living
	  }
	else
	  if (num_neighbors==3) // dead cell
	    new_world[i][j] = 1; // reproduction (new cell)
	  else
	    new_world[i][j] = 0; // remains empty cell
      }
}
 
void display_world(vector< vector<int> > &world)
{
  int i, j;
  int n = world.size();
  int num_living = 0;
  int num_dead = 0;
 
  // show the content of each cell in a reasonably readable format
  // (as a matrix with * denoting a living cell)
 
  for (i=0; i<n; i++)
    {
      for (j=0; j<n; j++)
	if (world[i][j]==1)
	  {
	    cout << "* ";
	    num_living++;
	  }
	else
	  {
	    cout << "  ";
	    num_dead++;
	  }
      cout << endl;
    }
 
  cout << endl;
  cout << "num_living = " << num_living << endl;
  cout << "num_dead =   " << num_dead << endl;
  cout << endl;
}
 
void compute_statistics(vector< vector<int> > &world,
			stats_t &stats,
			int t)
{
  int i,j;
  int n = world.size();
 
  // the number of living and dead cells is 0 initially
 
  stats.num_living[t] = 0;
  stats.num_dead[t]   = 0;
 
  // do the counts
 
  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      if (world[i][j]==1)
	stats.num_living[t]++;
      else
	stats.num_dead[t]++;
}
 
void run_simulation(params_t &params, stats_t &stats)
{
  int i, t = 0;
  vector< vector<int> > world(params.world_size);
  vector< vector<int> > new_world(params.world_size);
 
  // store the number of steps and make sure that there
  // is enough space to store the statistics 
 
  stats.num_steps=params.max_t;
  stats.num_living.resize(params.max_t+1);
  stats.num_dead.resize(params.max_t+1);
 
  // runs the simulation
 
  for (i=0; i<params.world_size; i++)
    {
      world[i].resize(params.world_size);
      new_world[i].resize(params.world_size);
    }
 
  // initialize the world
 
  initialize_world(world, params.initial_proportion);
 
  // compute statistics for the current time step (now t=0)
 
  compute_statistics(world, stats, t);
 
  // print out the initial world 
 
  if (params.display)
    {
      cout << "----------------------------------------------------------" << endl;
      cout << "INITIAL WORLD" << endl << endl;
      display_world(world);
    }
 
  for (t=1; t<=params.max_t; t++)
    {
      // create new world using the old world and the rules
 
      process_world(new_world, world);
 
      // new world becomes current world
 
      swap(world, new_world);
 
      // compute the statistics
 
      compute_statistics(world, stats, t);
 
      // print out the world (once in each params.delay steps)
 
      if (((t-1)%params.delay==0)&&(params.display))
	{
	  cout << "----------------------------------------------------------" << endl;
	  cout << "WORLD AT TIME " << t << endl << endl;
	  display_world(world);
	}
    }
}
 
void process_statistics(vector<stats_t> stats)
{
  int run;
  int t;
  int num_runs = stats.size();
  int max_t    = stats[0].num_steps;
 
  cout << "Final statistics over " << num_runs << " runs:" << endl;
 
  // process statistics for all time steps and runs
  // (averaging the numbers for each time step over
  // the runs)
 
  for (t=0; t<=max_t; t++)
    {
      double avg_num_living = 0;
      double avg_num_dead   = 0;
 
      for (run=0; run<num_runs; run++)
	{
	  avg_num_living += stats[run].num_living[t];
	  avg_num_dead   += stats[run].num_dead[t];
	}
 
      avg_num_living /= num_runs;
      avg_num_dead   /= num_runs;
 
      cout << t << " " << avg_num_living << " " << avg_num_dead << " ";
      cout << " " << avg_num_living*100/(avg_num_living+avg_num_dead) << " ";
      cout << " " << avg_num_dead*100/(avg_num_living+avg_num_dead) << " ";
      cout << endl;
    }
}
 
int main()
{
  int run;
  params_t params;
  vector<stats_t> stats;
 
  // initialize random number generator
 
  srand48(123);
 
  // read user parameters
 
  cin >> params.world_size;
  cin >> params.initial_proportion;
  cin >> params.max_t;
  cin >> params.delay;
  cin >> params.num_runs;
  cin >> params.display;
 
  // adjust parameters if necessary
 
  if (params.world_size<1)
    params.world_size=1;
  if (params.initial_proportion<0)
    params.initial_proportion=0;
  if (params.initial_proportion>1)
    params.initial_proportion=1;
  if (params.max_t<1)
    params.max_t=1;
  if (params.delay<1)
    params.delay=1;
  if (params.num_runs<1)
    params.num_runs=1;
 
  // print out parameters
 
  cout << "World size:         " << params.world_size << endl;
  cout << "Initial proportion: " << params.initial_proportion << endl;
  cout << "Maximum time steps: " << params.max_t << endl;
  cout << "Reporting period:   " << params.delay << endl; 
  cout << "Number of runs:     " << params.num_runs << endl;
  cout << "Display world:      " << params.display << endl;
  cout << endl;
 
  // run the game of life simulation
 
  stats.resize(params.num_runs);  // resize the vector for statistics
  for (run=0; run<params.num_runs; run++)
    {
      cout << "Executing run " << run << endl;
      run_simulation(params, stats[run]);   // execute one run
    }
  cout << endl;
 
  // process statistics
 
  process_statistics(stats);
 
  // return 0 from main
 
  return 0;
}
 

#include <iostream>
#include <vector>
#include <stdlib.h>

using namespace std;

struct params_t{
  int world_size; // size of the world (side of the square world)
  double initial_proportion; // initial proportion of living cells
  int max_t; // maximum time for simulation
  int delay; // period in terms of the number of time steps before
             // each display of the world (to make more efficient
             // outputs)
  int num_runs; // number of runs to execute
  int display; // turn on the display-world feature (yes=1, no=0)
};

struct stats_t {
  int num_steps;           // the number of time steps
  vector<int> num_living;  // the number of living cells (at a time)
  vector<int> num_dead;    // the number of dead cells (at a time)
};

void initialize_world(vector< vector<int> > &world, double p)
{
  int i, j, n;

  n = world.size();

  // generate each cell to be alive with probability p

  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      {
	if (drand48()<p)
	  world[i][j] = 1;
	else
	  world[i][j] = 0;
      }
}

int count_neighbors(vector< vector<int> > &world, 
		    int i,
		    int j,
		    int n)
{
  int di, dj;
  int num_neighbors=0;

  // note that this assumes wrap-around world, in which
  // the last cell in any row is a neighbor of the very
  // first cell in the row; similarly for the columns

  for (di = -1; di <= 1; di++)
    for (dj = -1; dj <= 1; dj++)
      if ((di!=0)||(dj!=0))
	num_neighbors += world[(i+di+n)%n][(j+dj+n)%n];

  // return the number of neighbors

  return num_neighbors;      
}

void process_world(vector< vector<int> > &new_world,
		   vector< vector<int> > &world)
{
  int i, j;
  int n = world.size();

  // count neighbors of every cell, and generate the new
  // world using the basic rules of the game of life
  // - living cell dies if less than 2 living neighbors
  // - living cell dies if more than 3 living neighbors
  // - dead cell changes to living if exactly 3 neighbors
  // - otherwise, no change

  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      {
	int num_neighbors = count_neighbors(world, i, j, n);

	// these conditions implement the rules
	
	if (world[i][j]==1) // living cell
	  {
	    if (num_neighbors<2)
	      new_world[i][j] = 0;   // died because of underpopulation
	    else
	      if (num_neighbors>3)
		new_world[i][j] = 0; // died because of overcrowding
	      else
		new_world[i][j] = 1; // cell goes on living
	  }
	else
	  if (num_neighbors==3) // dead cell
	    new_world[i][j] = 1; // reproduction (new cell)
	  else
	    new_world[i][j] = 0; // remains empty cell
      }
}

void display_world(vector< vector<int> > &world)
{
  int i, j;
  int n = world.size();
  int num_living = 0;
  int num_dead = 0;

  // show the content of each cell in a reasonably readable format
  // (as a matrix with * denoting a living cell)

  for (i=0; i<n; i++)
    {
      for (j=0; j<n; j++)
	if (world[i][j]==1)
	  {
	    cout << "* ";
	    num_living++;
	  }
	else
	  {
	    cout << "  ";
	    num_dead++;
	  }
      cout << endl;
    }

  cout << endl;
  cout << "num_living = " << num_living << endl;
  cout << "num_dead =   " << num_dead << endl;
  cout << endl;
}

void compute_statistics(vector< vector<int> > &world,
			stats_t &stats,
			int t)
{
  int i,j;
  int n = world.size();

  // the number of living and dead cells is 0 initially

  stats.num_living[t] = 0;
  stats.num_dead[t]   = 0;

  // do the counts
  
  for (i=0; i<n; i++)
    for (j=0; j<n; j++)
      if (world[i][j]==1)
	stats.num_living[t]++;
      else
	stats.num_dead[t]++;
}

void run_simulation(params_t &params, stats_t &stats)
{
  int i, t = 0;
  vector< vector<int> > world(params.world_size);
  vector< vector<int> > new_world(params.world_size);

  // store the number of steps and make sure that there
  // is enough space to store the statistics 

  stats.num_steps=params.max_t;
  stats.num_living.resize(params.max_t+1);
  stats.num_dead.resize(params.max_t+1);

  // runs the simulation

  for (i=0; i<params.world_size; i++)
    {
      world[i].resize(params.world_size);
      new_world[i].resize(params.world_size);
    }

  // initialize the world
  
  initialize_world(world, params.initial_proportion);

  // compute statistics for the current time step (now t=0)

  compute_statistics(world, stats, t);

  // print out the initial world 

  if (params.display)
    {
      cout << "----------------------------------------------------------" << endl;
      cout << "INITIAL WORLD" << endl << endl;
      display_world(world);
    }

  for (t=1; t<=params.max_t; t++)
    {
      // create new world using the old world and the rules
      
      process_world(new_world, world);

      // new world becomes current world

      swap(world, new_world);

      // compute the statistics

      compute_statistics(world, stats, t);

      // print out the world (once in each params.delay steps)

      if (((t-1)%params.delay==0)&&(params.display))
	{
	  cout << "----------------------------------------------------------" << endl;
	  cout << "WORLD AT TIME " << t << endl << endl;
	  display_world(world);
	}
    }
}

void process_statistics(vector<stats_t> stats)
{
  int run;
  int t;
  int num_runs = stats.size();
  int max_t    = stats[0].num_steps;

  cout << "Final statistics over " << num_runs << " runs:" << endl;

  // process statistics for all time steps and runs
  // (averaging the numbers for each time step over
  // the runs)

  for (t=0; t<=max_t; t++)
    {
      double avg_num_living = 0;
      double avg_num_dead   = 0;

      for (run=0; run<num_runs; run++)
	{
	  avg_num_living += stats[run].num_living[t];
	  avg_num_dead   += stats[run].num_dead[t];
	}
      
      avg_num_living /= num_runs;
      avg_num_dead   /= num_runs;
      
      cout << t << " " << avg_num_living << " " << avg_num_dead << " ";
      cout << " " << avg_num_living*100/(avg_num_living+avg_num_dead) << " ";
      cout << " " << avg_num_dead*100/(avg_num_living+avg_num_dead) << " ";
      cout << endl;
    }
}

int main()
{
  int run;
  params_t params;
  vector<stats_t> stats;

  // initialize random number generator

  srand48(123);

  // read user parameters

  cin >> params.world_size;
  cin >> params.initial_proportion;
  cin >> params.max_t;
  cin >> params.delay;
  cin >> params.num_runs;
  cin >> params.display;
  
  // adjust parameters if necessary
  
  if (params.world_size<1)
    params.world_size=1;
  if (params.initial_proportion<0)
    params.initial_proportion=0;
  if (params.initial_proportion>1)
    params.initial_proportion=1;
  if (params.max_t<1)
    params.max_t=1;
  if (params.delay<1)
    params.delay=1;
  if (params.num_runs<1)
    params.num_runs=1;
  
  // print out parameters
  
  cout << "World size:         " << params.world_size << endl;
  cout << "Initial proportion: " << params.initial_proportion << endl;
  cout << "Maximum time steps: " << params.max_t << endl;
  cout << "Reporting period:   " << params.delay << endl; 
  cout << "Number of runs:     " << params.num_runs << endl;
  cout << "Display world:      " << params.display << endl;
  cout << endl;

  // run the game of life simulation

  stats.resize(params.num_runs);  // resize the vector for statistics
  for (run=0; run<params.num_runs; run++)
    {
      cout << "Executing run " << run << endl;
      run_simulation(params, stats[run]);   // execute one run
    }
  cout << endl;

  // process statistics

  process_statistics(stats);

  // return 0 from main

  return 0;
}


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