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Have any of you gurus come up with a method of obtaining unbuffered input in C++ using iostream.h alone?
I've searched the board. :D
http://cboard.cprogramming.com/searc...der=descending
I thought I could do it with some inline asm but VC 6 and my other 32 bit compilers lock up at execution time... blasted WinAPI. This is for a console app.
TIA
Well, you could make it a win32 app and receive char messages.
Why would you want to do this?
I have not worked this problem yet but I know iostream.h provides a way to do it by typing
flush keyword at the point where you want to emty the buffer.I am not clear about this but I think try to use
cin>>var>>flush();
or a similar one because some time ago I have a situation like this
cin>>var1;
cin.getline(var2);
but this code does not work correctly unless you empty the previous '\n' character from buffer!!!
I dunno Windows programming, but I think that I "know" dos programming. :)Quote:
Originally posted by golfinguy4
Well, you could make it a win32 app and receive char messages.
Why would you want to do this?
It's for a dos based (or win32 console) text editor that I've been playing with for months.
nag, I don't what the user the have to hit the enter key at all. I wrote a simple keyboard driver using inline asm, but it works only with my 16 bit compilers. The function call locks up all of my 32 bit compilers. It must be my use of registers, but I dunno 32 bit asm either.
Anywas, thanks for the feedback.
>>I know iostream.h provides a way to do it by typing
flush keyword at the point where you want to emty the buffer.
First, you can't use flush on an istream, second, flushing the stream doesn't give you unbuffered input, it just flushes the buffer after every character.
>>Have any of you gurus come up with a method of obtaining unbuffered input in C++ using iostream.h alone?
You can't do it unless your operating system has a feature to switch from cooked to raw terminal input. But there's no way using just C++ to get unbuffered input, it's too platform dependent.
how about the old .......... getch().............function from
conio.h library....????????/
Non-standard, see the new faq.
http://faq.cprogramming.com/cgi-bin/...&id=1043284392
Do you mean hardware registers? Because any windows OS "beyond" Win98 doesn't allow user mode programs access to the hardware. And, assembly won't help that either. :(Quote:
It must be my use of registers
>Do you mean hardware registers? Because any windows >OS "beyond" Win98 doesn't allow user mode programs access >to the hardware. And, assembly won't help that either
Really?? You mean to say that on my XP computer, if I throw in some inline assembly that references EAX or something, it will have a problem? Not that I really care, but...
How will they continue to teach assembly in the schools?