LE JEU DE LA VIE EN C++

#include <iostream>
#include <vector>
#include <cmath>
#include <unistd.h>
#include <sstream>
using namespace std;

void vect (vector<bool> v)
{
  for (int i=0;i<v.size();i++)
    {
      if (i == v.size()-1)
	{
          if (v[i]) cout << '*'<< endl; 
          else cout << ' ' << endl;
        }
      else 
      {
        if (v[i]) cout << "*";
        else cout << " ";
      }
    }
}

void affiche_vect(vector <vector <bool> > v)
{
  for (int i=0;i<v.size();i++)
    vect(v[i]);
}

int nbvie (unsigned int li, unsigned int co, vector <vector <bool> > &tab)
{
  int nb=0;
  int x=tab[0].size();
  int y=tab.size();
  for (int i=-1;i<=1;i++)
    for (int j=-1;j<=1;j++)
      if (tab[(li+i+y)%y][(co+j+x)%x]) ++nb;
	if (tab[li][co]) --nb;
  return (nb);
}

vector <vector <bool> > init (unsigned int li, unsigned int co)
{
  srand(time(NULL));
  vector <vector <bool> > tab (li, vector <bool> (co, false));
  for (int i=0;i<li;i++)
    for (int j=0;j<co;j++)
      if (rand()%2==1) tab[i][j]=true;
  return (tab);
}

bool evo (unsigned int li, unsigned int co, vector <vector <bool> > &tab)
{
  bool etat = tab[li][co];
  int vie = nbvie(li,co,tab);
  if (!etat) {
    if (vie == 3) 
      etat = true;
  }
  else {
    if (!(vie == 3 || vie == 2)) 
      etat=false;
  }
  return(etat);
}

vector<int> compte(vector <vector <bool> > tab)
{
  vector<int> stock;
  for(int i = 0; i < tab.size(); ++i)
    for(int j = 0; j < tab[0].size(); ++j) {
      bool a = evo(i, j, tab);
      if(tab[i][j] != a) {
	stock.push_back(i);
	stock.push_back(j);
      }
    }
   return stock;
}	

int main (int argc, char *argv[])
{
	system("clear");
	int li,co;
	istringstream iss(argv[1]);
	iss >> li;
	istringstream iss1(argv[2]);
	iss1 >> co;
	vector <vector <bool> > tab = init(li,co);
                system("clear");
	affiche_vect(tab);
	int n = 1;
	while (n)
	{
                                usleep(100);
		system("clear");  
		vector<int> coord_modif = compte(tab);
		for(int a = 0; a < coord_modif.size(); a+=2)
		  {
		  int i = coord_modif[a];
		  int j = coord_modif[a + 1];
		  tab[i][j] = ! tab[i][j];
		  }
		    
		affiche_vect(tab);
		cout << "phase " << n << endl;
		++n;
	}
	return (0);
}