C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  wait for keyboard entry ?          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Pelo GANDO Guest Posted: Thu Mar 04, 2004 9:08 am    Post subject: wait for keyboard entry ? Hi everybody, It's me again...Pelo, for an other beginner question... What the code should be in C++ to wait for a keyboard entry in order to execute the sequal of my program... Back to top Pelo GANDO Guest Posted: Thu Mar 04, 2004 9:32 am    Post subject: getch() function I found by myself... #include <conio.h> cout << "Press any key to terminate this program. " ; getch(); The getch() function call causes the program to wait for a single keystroke. "Pelo GANDO" c26rlv$i9v$1 (AT) news-reader3 (DOT) wanadoo.fr... Quote: Hi everybody, It's me again...Pelo, for an other beginner question... What the code should be in C++ to wait for a keyboard entry in order to execute the sequal of my program... Back to top Mike Wahler Guest Posted: Thu Mar 04, 2004 9:47 am    Post subject: Re: [OT, welcome msg] getch() function "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote Quote: I found by myself... #include cout << "Press any key to terminate this program. " ; getch(); The getch() function call causes the program to wait for a single keystroke. But alas it's not part of the C++ language. It's an 'extension' provided by your implementation, not topical here. Here we discuss the ISO standard C++ langauge, which has no means to do what you're asking. See: http://www.slack.net/~shiva/welcome.txt -Mike Back to top Pelo GANDO Guest Posted: Thu Mar 04, 2004 9:52 am    Post subject: Re: [OT, welcome msg] getch() function thank you ! "Mike Wahler" <mkwahler (AT) mkwahler (DOT) net> a écrit dans le message de news: 5XC1c.20812$aT1.4581 (AT) newsread1 (DOT) news.pas.earthlink.net... Quote: "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote in message news:c26t39$8t0$1 (AT) news-reader5 (DOT) wanadoo.fr... I found by myself... #include cout << "Press any key to terminate this program. " ; getch(); The getch() function call causes the program to wait for a single keystroke. But alas it's not part of the C++ language. It's an 'extension' provided by your implementation, not topical here. Here we discuss the ISO standard C++ langauge, which has no means to do what you're asking. See: http://www.slack.net/~shiva/welcome.txt -Mike Back to top Pelo GANDO Guest Posted: Thu Mar 04, 2004 9:54 am    Post subject: Re: [OT, welcome msg] getch() function Sir, How would you do in ISO standard C++... I would like knwo from you... Thank you "Mike Wahler" <mkwahler (AT) mkwahler (DOT) net> a écrit dans le message de news: 5XC1c.20812$aT1.4581 (AT) newsread1 (DOT) news.pas.earthlink.net... Quote: "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote in message news:c26t39$8t0$1 (AT) news-reader5 (DOT) wanadoo.fr... I found by myself... #include cout << "Press any key to terminate this program. " ; getch(); The getch() function call causes the program to wait for a single keystroke. But alas it's not part of the C++ language. It's an 'extension' provided by your implementation, not topical here. Here we discuss the ISO standard C++ langauge, which has no means to do what you're asking. See: http://www.slack.net/~shiva/welcome.txt -Mike Back to top Jacob Jensen Guest Posted: Thu Mar 04, 2004 10:03 am    Post subject: Re: wait for keyboard entry ? Quote: What the code should be in C++ to wait for a keyboard entry in order to execute the sequal of my program... You can use std::cin which redirects input from stdin (your keyboard) to a string in your program. Example #include <string> int main() { std::string sInputString; // Wait for input from stdin (the keyboard) std::cin >> sInputString; // Print out to the screen what the user just input std::cout << "The user just input the following string: " << sInputString << std::endl; } I hope this helps Back to top amateur Guest Posted: Thu Mar 04, 2004 10:04 am    Post subject: Re: wait for keyboard entry ? "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote Quote: Hi everybody, It's me again...Pelo, for an other beginner question... What the code should be in C++ to wait for a keyboard entry in order to execute the sequal of my program... c++ doesn't have such a concept. If you work under character environments such as unix or old dos you'll usually call a single function to achieve that. Non standard headers like <conio.h> for dos may provide what you're looking for. Others will point you to correct newsgroups. If you work under some GUI like Windows or the X, than your whole program concept changes. You wait for specific messages/callbacks from your OS/GUI/Framework manager or whatever. And that's a complex topic which is not discussed here. Back to top Mike Wahler Guest Posted: Thu Mar 04, 2004 10:14 am    Post subject: Re: [OT, welcome msg] getch() function "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote Quote: Sir, How would you do [nonblocking input] Quote: in ISO standard C++... I would like knwo from you... Like I said, it cannot be done with standard C++. You'll need to use an extension, such as the one you mentioned. However you should note that this will only work with that particular compiler, others will have their own way, if they have any at all. When you encounter this situation, I advise you to isolate and clearly identify such uses, so porting will be easier when the time comes. -Mike Back to top Jacob Jensen Guest Posted: Thu Mar 04, 2004 11:20 am    Post subject: Re: [OT, welcome msg] getch() function What is wrong with std::cin >> SomeString; Jacob "Mike Wahler" <mkwahler (AT) mkwahler (DOT) net> wrote Quote: "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote in message news:c26ucq$qcb$1 (AT) news-reader2 (DOT) wanadoo.fr... Sir, How would you do [nonblocking input] in ISO standard C++... I would like knwo from you... Like I said, it cannot be done with standard C++. You'll need to use an extension, such as the one you mentioned. However you should note that this will only work with that particular compiler, others will have their own way, if they have any at all. When you encounter this situation, I advise you to isolate and clearly identify such uses, so porting will be easier when the time comes. -Mike Back to top Rolf Magnus Guest Posted: Thu Mar 04, 2004 12:17 pm    Post subject: Re: [OT, welcome msg] getch() function Mike Wahler wrote: Quote: "Pelo GANDO" <o0593m (AT) hotmail (DOT) com> wrote in message news:c26ucq$qcb$1 (AT) news-reader2 (DOT) wanadoo.fr... Sir, How would you do [nonblocking input] How would waiting for keyboard input be _non_blocking? Back to top Tor Husabø Guest Posted: Thu Mar 04, 2004 12:29 pm    Post subject: Re: wait for keyboard entry ? Jacob Jensen wrote: Quote: What the code should be in C++ to wait for a keyboard entry in order to execute the sequal of my program... You can use std::cin which redirects input from stdin (your keyboard) to a string in your program. Example #include <string int main() { std::string sInputString; // Wait for input from stdin (the keyboard) std::cin >> sInputString; // Print out to the screen what the user just input std::cout << "The user just input the following string: " sInputString << std::endl; } I hope this helps This would require the user to press Enter before anything would happen, and that's probably not good enough. (Assuming the 'Press any key to continue' thing is what he's after.) :) But printing 'Press Enter to continue.' and then reading from std::cin could be a viable solution, although less elegant then conio's getch() and the likes. Tor Back to top Unforgiven Guest Posted: Thu Mar 04, 2004 3:36 pm    Post subject: Re: [OT, welcome msg] getch() function Jacob Jensen wrote: Quote: What is wrong with std::cin >> SomeString; Won't return until <enter> is pressed. -- Unforgiven Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language (comp.lang.c++) All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.