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Hi all,
I have am writing a simple user interface that scans a single keyboard keystroke. I am using scanf ("%s", input); along with a errorchecking function.
My question is: Does anyone know how to scan in a single user keystroke input without the user hitting <cr> on the keyboard. (Automatic <cr> after a keystroke)
My interface consists of a several numbered menus, therefore an automatic <cr> will make my user interface flow more smoothly.
Thanks in advance.
~jc
Hi chubaka,
THis question comes up alot when people are learning C. The short answer is: There isn't a good way to do it. When you scan a string or a single character from the keyboard, it isn't actually flushed from the input buffer to your program until the user presses <return>. You should get used to this fact and just have menus where the user has to type <return>.
The long answer is, it is possible, although vastly more complicated then you probably want to get into if you're a beginner. The "curses" library on UNIX/Linux systems allows for this type of behavior as well as "positive carriage control" meaning that you can print stuff where you want on the terminal screen (For example, updating a clock always at the top-right corner, not always just printing to the next line). See curses.h in your /usr/include directory if you're really eager. Windows programming is entirely different but has a similar library.
Thanks PopRox...
I wouldn't say I'm a beginner, nor an advanced C programer. However, I am interested in finding an work around for a windows terminal based interface.
Can you direct me to the proper Window's Library file. (I'm using MS Visual C (MSVC) )
Thanks!
In addition to MSVC, I'm using a modified GNU complier (gcc)
~jc