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Old 05-27-2005, 04:33 AM   #1
himateja
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Registered: May 2005
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problem recognising key strokes


In my application i have a command prompt..at that command prompt i wud like to facilitate the usage of up and down keys so that the user can get the previous typed queries instead of writing back the whole thing...please tell me how to recognize the up and down keys...is it with the ASCII values?
 
Old 05-27-2005, 04:47 AM   #2
saurabh_sahni
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Registered: Apr 2005
Location: Indore, India
Distribution: Mandrake 10.0
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simply store the commands in a file when they are executed... and retrive them when user preses arrow keys.. to detect pressing of keys use following function:

void getkey()
{
union REGS i,o;
i.h.ah=0;
int86(22,&i,&o);
scan=o.h.ah;
ascii=o.h.al;
}
if(ascii==0 && scan==72) //UP key
if(ascii==0 && scan==80) //down key
 
Old 05-27-2005, 05:00 AM   #3
Hko
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Registered: Aug 2002
Location: Groningen, The Netherlands
Distribution: ubuntu
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No, that's not with ascii codes, but with key-codes the terminal recieves. The ncurses library privodes functions to read these codes.
 
Old 05-27-2005, 05:54 AM   #4
himateja
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Registered: May 2005
Posts: 2

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hi saurabh thanks for the answer ..but are there any header files to be included because the compiler doesnt recognise int86 ........and there is no help from man command also....
 
  


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