#include <iostream.h>

     #include <termios.h>
     #include <string.h>

     static struct termios stored;
     
     void set_keypress(void)
     {
         struct termios newone;
     
         tcgetattr(0,&stored);
     
         memcpy(&newone,&stored,sizeof(struct termios));
     
         /* Disable canonical mode, and set buffer size to 1 byte */
         newone.c_lflag &= (~ICANON);
         newone.c_cc[VTIME] = 0;
         newone.c_cc[VMIN] = 1;
     
         tcsetattr(0,TCSANOW,&newone);
         return;
     }
     
     int isready(int fd)
     {
         int rc;
         fd_set fds;
         struct timeval tv;
     
         FD_ZERO(&fds);
         FD_SET(fd,&fds);
         tv.tv_sec = tv.tv_usec = 0;
     
         rc = select(fd+1, &fds, NULL, NULL, &tv);
         if (rc < 0)
           return -1;
     
         return FD_ISSET(fd,&fds) ? 1 : 0;
     }
     
     void echo_off(void)
     {
         struct termios newone;
         tcgetattr(0,&stored);
         memcpy(&newone, &stored, sizeof(struct termios));
         newone.c_lflag &= (~ECHO);
         tcsetattr(0,TCSANOW,&newone);
         return;
     }
     
void echo_on(void)
{
   struct termios newone;
   tcgetattr(0,&stored);
   memcpy(&newone, &stored, sizeof(struct termios));
   newone.c_lflag +=8;
   tcsetattr(0,TCSANOW,&newone);
}                     

int main()
{
cout<<"Type\n";
set_keypress();
echo_off();
char a=' ';
while (a!='z'){
   if (isready(1)) {
      cin.get(a);
      cout << a << flush;
      }
   }
}