#include <iostream> 
#include <cstdlib>
#include <ctime>
#define max_darts 2000000 

using namespace std;
// ΥΠΟΛΟΓΙΣΜΌς π ΜΕ MONTE CARLO

int main(int argc, char *argv[])
{  system("chcp 1253");
   // Seed the Random Number Generator at the start of the program
   srand( time( NULL ) );
   cout<<"Ελάχιστος τυχαίος μηδέν, Μεγιστος τυχαίος "<<RAND_MAX<<endl;
    double rm = (double) RAND_MAX;
    int i;
    int in,out;  // number of darts inside and outside the circle 
    double x,y;
    in=0; out=0;
    cout<<"Παράγονται "<<max_darts<<" τυχαία ζεύγη\n";
    for ( i=0; i<max_darts; i++) {
      // random number in [0,1]
      x = rand() / rm; 
      y = rand() / rm; 
      if ((x*x)+(y*y)<=1) in++; else out++;
    }
    cout<<"\n";

//approximate
    cout<<"Pi="<<4*(double)in/max_darts; 
    cout<<"\n";

    system("PAUSE");
    return 0;   
	}