Solved

Using function keys in C or C++

Posted on 1998-04-13
2
263 Views
Last Modified: 2010-05-18
Hello, how does one uses function keys in C or C++?For instance, I would like to link several functions into one programs. Then, by assigning various functions keys would like to call the necessary  function. A good example would be: Press f1 to go to help, f2--, f3--.
I'd be grateful for an answer,
Victor
0
Comment
Question by:tsar
2 Comments
 
LVL 1

Accepted Solution

by:
isaacguy earned 200 total points
ID: 1258121
Here's some code:

#include <conio.h>

#define KEY_F1 315
#define KEY_F2 316
#define KEY_F3 317
#define KEY_F4 318
#define KEY_F5 319
#define KEY_F6 320
#define KEY_F7 321
#define KEY_F8 322
#define KEY_F9 323
#define KEY_F10 324
#define KEY_F11 389
#define KEY_F12 390

int GetAKey(void)
{
     int ch;
     ch = getch();
     if (ch)
     {
          return ch;
     }
     else
     {
          return getch() + 256;
     };
};

This function will return the extended or standard key value for each key pressed.
The F keys values are above the code.  To find the values for other keys, simply make a test prog that outputs the values of a key when you press the key and add them to the define section.

To test for an F key:
int key;
key = GetAKey();
if (key == KEY_F1)
{
     //etc.
};

Good Luck!
0
 
LVL 7

Expert Comment

by:faster
ID: 1258122
This depends largely on the platform and whether you want your key functions to be active when other applications are running.
0

Featured Post

Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

Question has a verified solution.

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

Suggested Solutions

Summary: This tutorial covers some basics of pointer, pointer arithmetic and function pointer. What is a pointer: A pointer is a variable which holds an address. This address might be address of another variable/address of devices/address of fu…
Windows programmers of the C/C++ variety, how many of you realise that since Window 9x Microsoft has been lying to you about what constitutes Unicode (http://en.wikipedia.org/wiki/Unicode)? They will have you believe that Unicode requires you to use…
The goal of this video is to provide viewers with basic examples to understand how to use strings and some functions related to them in the C programming language.
The goal of this video is to provide viewers with basic examples to understand how to create, access, and change arrays in the C programming language.

911 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

Need Help in Real-Time?

Connect with top rated Experts

24 Experts available now in Live!

Get 1:1 Help Now