Solved

getchar()  problem

Posted on 1997-11-24
3
275 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
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

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Best tools for Backup and restore of Wordpress site 6 58
bigDiff challenge 17 135
mapBully challenge 6 178
How do I get Window Title of all opened process? 4 39
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…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
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.
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

730 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