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Full Discussion: Ascii value of character?
Top Forums UNIX for Dummies Questions & Answers Ascii value of character? Post 302234449 by sszd on Tuesday 9th of September 2008 05:48:56 PM
Old 09-09-2008
I just stumbled upon the following...

$ printf "%d" "'A"

This will give me 65, so likewise I can certainly do this...

$ var=A
$ printf "%d" "'${var}"

What I don't understand is the single quote immediately preceding the character. This is the only way it'll work, but I've never seen that syntax before. I quickly glanced at the man pages for printf and I still don't fully understand this. Can someone please explain? Thank you.
 

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SDL_JoystickOpen(3)						 SDL API Reference					       SDL_JoystickOpen(3)

NAME
SDL_JoystickOpen - Opens a joystick for use. SYNOPSIS
#include "SDL.h" SDL_Joystick *SDL_JoystickOpen(int index); DESCRIPTION
Opens a joystick for use within SDL. The index refers to the N'th joystick in the system. A joystick must be opened before it game be used. RETURN VALUE
Returns a SDL_Joystick structure on success. NULL on failure. EXAMPLES
SDL_Joystick *joy; // Check for joystick if(SDL_NumJoysticks()>0){ // Open joystick joy=SDL_JoystickOpen(0); if(joy) { printf("Opened Joystick 0 "); printf("Name: %s ", SDL_JoystickName(0)); printf("Number of Axes: %d ", SDL_JoystickNumAxes(joy)); printf("Number of Buttons: %d ", SDL_JoystickNumButtons(joy)); printf("Number of Balls: %d ", SDL_JoystickNumBalls(joy)); } else printf("Couldn't open Joystick 0 "); // Close if opened if(SDL_JoystickOpened(0)) SDL_JoystickClose(joy); } SEE ALSO
SDL_JoystickClose SDL
Tue 11 Sep 2001, 23:00 SDL_JoystickOpen(3)
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