#include "philosopher.h"using namespace std;philosopher::philosopher(int n, int forks, void *arg)  : Pthread(arg){  _nr    = n;  _forks = forks;  _count = forks;}philosopher::~philosopher(){}static void rand_sleep(int max){  double x = rand();  x /= RAND_MAX;  sleep( (int)(x*max) );}int philosopher::thread(void *ptr){  int lfork,rfork;  lfork = _nr-1 >= 0 ? _nr-1 : _forks-1;  rfork = lfork+1 >= _forks ? 0 : lfork+1;  application = (dining *)ptr;  while(_count-- > 0) {    cout << "Philosopher " << _nr;    cout << " looking for (" << lfork << ',' << rfork << ")" << endl;    while( application->get_forks(_nr) == false )      usleep(10);    cout << "Philosopher " << _nr << " using (" << lfork << ',' <<  rfork << ")\n";    rand_sleep( 20 );    cout << "Philosopher " << _nr << ": sleeping\n";    application->put_forks(_nr);    rand_sleep( 20 );  }  application->finished(_nr);  cout << _nr << " has finished dining." << endl;  return 0;}