void count_up(){
for(m_count=1;m_count<N;m_count++){
m_print_sem.put();
m_count_sem.take();
}
cout<<"count up () finished"<<endl;
m_done=true;
m_print_sem.put();
}
void print(){
do{
m_print_sem.take();
cout<<"Counting: "<<m_count<<endl;
cout<<flush;
m_count_sem.put();
}while(!m_done);
cout<<"print() finished"<<endl;
}
