RFC: C++ "Hit any key to continue..." solution

flakier · 09-01-2004, 01:45 PM

So, I've been searching for a cross platform way (works on UNIX and Windows) to implement "Hit any key to continue..." functionality.

Specificaly, a better solution than any that are given here:
http://faq.cprogramming.com/cgi-bin/...&id=1043284385

I have come up with (I think) a cross platform, C++ solution that takes care of a terminal environment that does input line buffering

Code:

#include <iostream>
using namespace std;

int main() {
    cout << "\nPress any key to continue..." << endl;
    streambuf *pbuf;
    pbuf=cin.rdbuf()->setbuf(NULL, 1);
    pbuf->sgetc();

    return 0;
}

What do people think of that? Will it work on windows?

bithub · 09-01-2004, 02:20 PM

Doesn't compile on my machine.

error C2248: 'setbuf' : cannot access protected member declared in class 'std::basic_streambuf<char,struct std::char_traits<char> >'

XSquared · 09-01-2004, 02:23 PM

It doesn't compile under GCC 3.3.4 on Debian Linux either:

Code:

matt@debianbox c $ g++ -pedantic -Wall flakier.cpp
/usr/include/c++/3.3/streambuf: In function `int main()':
/usr/include/c++/3.3/streambuf:713: error: `std::basic_streambuf<_CharT,
   _Traits>* std::basic_streambuf<_CharT, _Traits>::setbuf(_CharT*, int) [with
   _CharT = char, _Traits = std::char_traits<char>]' is protected
flakier.cpp:7: error: within this context
matt@debianbox c $

flakier · 09-01-2004, 02:29 PM

Hmm, back to the drawing board!

I've got an old gcc-2.95.2.1 and at home VS.NET2002

I think I saw something on technet about streambuf::setbuf being replaced by pubsetbuf()

Thanks for the reports :)

~Jason

major_small · 09-02-2004, 07:37 AM

eh, what's wrong with cin.get()?

**laserlight** · 09-02-2004, 07:59 AM

Quote:

Originally Posted by major_small

eh, what's wrong with cin.get()?

What about cin.ignore()?

The Brain · 09-02-2004, 08:00 AM

with cin.get() you are restricted to only hitting, "Enter" as opposed to system("pause") which will allow you to hit any key to continue. (although it is non-portable/OS dependant)

btw I am waiting for a portable alternative to cin.get() that will allow the user to "hit any key to continue".. mainly so I can use it in my programs

Frobozz · 09-02-2004, 08:21 AM

You could just use preprocessors to compile one method if it is being compiled under Windows and another method if it is under Linux.

major_small · 09-02-2004, 08:41 AM

Quote:

Originally Posted by The Brain

with cin.get() you are restricted to only hitting, "Enter" as opposed to system("pause") which will allow you to hit any key to continue. (although it is non-portable/OS dependant)

btw I am waiting for a portable alternative to cin.get() that will allow the user to "hit any key to continue".. mainly so I can use it in my programs

oh i see now... well, you could always use getch()... supposedly it's not portable, but I've seen it included with every compiler/linker I've ever used... and it's not OS-dependant...

XSquared · 09-02-2004, 10:40 AM

Well, it's not included in GCC 3.3.4 on my Debian Linux box.

major_small · 09-02-2004, 10:51 AM

Quote:

Originally Posted by XSquared

Well, it's not included in GCC 3.3.4 on my Debian Linux box.

well... I didn't say I tried it on every compiler out there, did I?

i've only really tried it on an old borland compiler, Dev-C++ (migw port of gcc), MSVC (who knows), and G++ (version ?)

**Thantos** · 09-02-2004, 10:56 AM

One thing to remember is that a standard solution doesn't have to preform a solution the same way on every machine, just provide a standard interface AND a standard result. How you go from the interface to the result can change depending on the environment.

As Frobozz said you can use preproccessor directives to decide which solution to use.

For a *nix solution I posted one at: faq: cached input with mygetch(). Once I find the updated code on my computer and verify that it works I'll post a more c++ based solution.

09-01-2004, 01:45 PM	#1
flakier Registered User Join Date: Sep 2004 Posts: 2	RFC: C++ "Hit any key to continue..." solution So, I've been searching for a cross platform way (works on UNIX and Windows) to implement "Hit any key to continue..." functionality. Specificaly, a better solution than any that are given here: http://faq.cprogramming.com/cgi-bin/...&id=1043284385 I have come up with (I think) a cross platform, C++ solution that takes care of a terminal environment that does input line buffering Code: #include <iostream> using namespace std; int main() { cout << "\nPress any key to continue..." << endl; streambuf *pbuf; pbuf=cin.rdbuf()->setbuf(NULL, 1); pbuf->sgetc(); return 0; } What do people think of that? Will it work on windows?
flakier is offline

09-01-2004, 02:20 PM	#2
bithub Registered User Join Date: Sep 2004 Location: California Posts: 2,845	Doesn't compile on my machine. error C2248: 'setbuf' : cannot access protected member declared in class 'std::basic_streambuf<char,struct std::char_traits<char> >'
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09-01-2004, 02:23 PM	#3
XSquared C++ Developer Join Date: Jun 2002 Location: UWaterloo Posts: 2,718	It doesn't compile under GCC 3.3.4 on Debian Linux either: Code: matt@debianbox c $ g++ -pedantic -Wall flakier.cpp /usr/include/c++/3.3/streambuf: In function `int main()': /usr/include/c++/3.3/streambuf:713: error: `std::basic_streambuf<_CharT, _Traits>* std::basic_streambuf<_CharT, _Traits>::setbuf(_CharT, int) [with _CharT = char, _Traits = std::char_traits<char>]' is protected flakier.cpp:7: error: within this context matt@debianbox c $ __________________ Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun* pressing the search button after typing four whole words! - Quzah You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie
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09-01-2004, 02:29 PM	#4
flakier Registered User Join Date: Sep 2004 Posts: 2	Hmm, back to the drawing board! I've got an old gcc-2.95.2.1 and at home VS.NET2002 I think I saw something on technet about streambuf::setbuf being replaced by pubsetbuf() Thanks for the reports :) ~Jason
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09-02-2004, 07:37 AM	#5
major_small Registered User Join Date: May 2003 Posts: 2,787	eh, what's wrong with cin.get()? __________________ Join is in our Unofficial Cprog IRC channel Server: irc.phoenixradio.org Channel: #Tech Team Cprog Folding@Home: Team #43476 Download it Here Detailed Stats Here More Detailed Stats 52 Members so far, are YOU a member? Current team score: 1223226 (ranked 374 of 45152) The CBoard team is doing better than 99.16% of the other teams Top 5 Members: Xterria(518175), pianorain(118517), Bennet(64957), JaWiB(55610), alphaoide(44374) Last Updated on: Wed, 30 Aug, 2006 @ 2:30 PM EDT
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09-02-2004, 08:00 AM	#7
The Brain VA National Guard Join Date: May 2004 Location: Manassas, VA USA Posts: 902	with cin.get() you are restricted to only hitting, "Enter" as opposed to system("pause") which will allow you to hit any key to continue. (although it is non-portable/OS dependant) btw I am waiting for a portable alternative to cin.get() that will allow the user to "hit any key to continue".. mainly so I can use it in my programs __________________ "Problem Solving C++, The Object of Programming" -Walter Savitch "Data Structures and Other Objects using C++" -Walter Savitch "Assembly Language for Intel-Based Computers" -Kip Irvine "Programming Windows, 5th edition" -Charles Petzold "Visual C++ MFC Programming by Example" -John E. Swanke "Network Programming Windows" -Jones/Ohlund "Sams Teach Yourself Game Programming in 24 Hours" -Michael Morrison "Mathmatics for 3D Game Programming & Computer Graphics" -Eric Lengyel Last edited by The Brain; 09-02-2004 at 08:36 AM.
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09-02-2004, 08:21 AM	#8
Frobozz Registered User Join Date: Dec 2002 Posts: 546	You could just use preprocessors to compile one method if it is being compiled under Windows and another method if it is under Linux.
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09-02-2004, 10:40 AM	#10
XSquared C++ Developer Join Date: Jun 2002 Location: UWaterloo Posts: 2,718	Well, it's not included in GCC 3.3.4 on my Debian Linux box. __________________ Naturally I didn't feel inspired enough to read all the links for you, since I already slaved away for long hours under a blistering sun pressing the search button after typing four whole words! - Quzah You. Fetch me my copy of the Wall Street Journal. You two, fight to the death - Stewie
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09-02-2004, 10:56 AM	#12
Thantos & the hat of GPL slaying Join Date: Sep 2001 Posts: 5,730	One thing to remember is that a standard solution doesn't have to preform a solution the same way on every machine, just provide a standard interface AND a standard result. How you go from the interface to the result can change depending on the environment. As Frobozz said you can use preproccessor directives to decide which solution to use. For a *nix solution I posted one at: faq: cached input with mygetch(). Once I find the updated code on my computer and verify that it works I'll post a more c++ based solution.
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