Solved

getchar()  problem

Posted on 1997-11-24
3
287 Views
Last Modified: 2013-12-26
HI, I'm doing a unix programming. However, i get problem when I try to read some input from keyboard. I use "getchar()" to do it, however, the programming is justing waiting there until somebody key in something.  Is there a way to periodly check if there is any key-input in the input-buffer. If there is, then read the key. If not, continue to wait.  I have do this in DOS. However, I don't know how to do it in UNIX.  
0
Comment
Question by:wzou
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 
LVL 10

Accepted Solution

by:
rbr earned 40 total points
ID: 1295679
In Unix this problem is a little bit complicated. You have to use ioctl and
the read function. Use your manual, and if you are interessted in a programm
working with this send an email to rbr@physik.kfunigraz.ac.at. I'll send you
a demo program.
0
 
LVL 84

Expert Comment

by:ozo
ID: 1295680
#include <time.h>
int select(size_t nfds, int *readfds, int *writefds, int *exceptfds, const struct timeval *timeout );

#include <curses.h>
halfdelay(1)

#include <fcntl.h>
fcntl(0, F_SETFL, O_NDELAY);

#include <termio.h>
termio.c_cc[VMIN] = 0;
termio.c_cc[VTIME] = 0;
0
 

Author Comment

by:wzou
ID: 1295681
Hi rbr,

Thanks for help. I will appreciate if you could send me the demo . My Email address is wzou@comp.uark.edu.

Best regards!!



0

Featured Post

[Webinar] How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
Introduction: The undo support, implementing a stack. Continuing from the eigth article about sudoku.   We need a mechanism to keep track of the digits entered so as to implement an undo mechanism.  This should be a ‘Last In First Out’ collec…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question