problem recognising key strokes

himateja · 05-27-2005, 04:33 AM

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?

saurabh_sahni · 05-27-2005, 04:47 AM

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

Hko · 05-27-2005, 05:00 AM

No, that's not with ascii codes, but with key-codes the terminal recieves. The ncurses library privodes functions to read these codes.

himateja · 05-27-2005, 05:54 AM

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....