Have you looked in <curses.h> to see what the getch() function does? Hint: OSX and Linux are not the same as Windows. Specifically, as a macro in <curses.h>, we find: #define getch() wgetch(stdscr) Now, there appears, on your system, to be an actual function getch() in the curses library, but it expects stdscr to be … Read more
The curses library is a package deal. You can’t just pull out one routine and hope for the best without properly initializing the library. Here’s a code that correctly blocks on getch(): #include <curses.h> int main(void) { initscr(); timeout(-1); int c = getch(); endwin(); printf (“%d %c\n”, c, c); return 0; }
On Linux, getch() is probably the curses function, which is quite different from the Windows-specific function of the same name. curses (ncurses) is probably overkill for what you want to do. The simplest approach would be to wait until the user presses Enter, which you can do like this: int c; printf(“Press <enter> to quit: … Read more
On Linux, getch() is probably the curses function, which is quite different from the Windows-specific function of the same name. curses (ncurses) is probably overkill for what you want to do. The simplest approach would be to wait until the user presses Enter, which you can do like this: int c; printf(“Press <enter> to quit: … Read more
No need to explain, the code talks better : #include <conio.h> // … printf(“please press P key to pause \n “); int key = 0; while(1) { if (_kbhit()) { key =_getch(); if (key == ‘P’) break; } }
You should be able to erase an asterisk by writing the characters \x08 \x08. The \x08 will move the cursor back one position, the space will overwrite the asterisk, then the last \x08 will move the cursor back again, putting it in the correct position to write the next *. I don’t know off the … Read more
You could use the JLine library’s ConsoleReader.readVirtualKey() method. See http://jline.sourceforge.net/apidocs/jline/ConsoleReader.html#readVirtualKey(). If you don’t want to use a 3rd party library, and if you are on Mac OS X or UNIX, you can just take advantage of the same trick that JLine uses to be able to read individual characters: just execute the command “stty -icanon … Read more
Since ruby 2.0.0, there is a ‘io/console’ in the stdlib with this feature require ‘io/console’ STDIN.getch
Try this conio.h file: #include <termios.h> #include <unistd.h> #include <stdio.h> /* reads from keypress, doesn’t echo */ int getch(void) { struct termios oldattr, newattr; int ch; tcgetattr( STDIN_FILENO, &oldattr ); newattr = oldattr; newattr.c_lflag &= ~( ICANON | ECHO ); tcsetattr( STDIN_FILENO, TCSANOW, &newattr ); ch = getchar(); tcsetattr( STDIN_FILENO, TCSANOW, &oldattr ); return ch; … Read more
If your linux has no conio.h that supports kbhit() you can look here for Morgan Mattews’s code to provide kbhit() functionality in a way compatible with any POSIX compliant system. As the trick desactivate buffering at termios level, it should also solve the getchar() issue as demonstrated here.