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Visual C++

SDL_JoystickOpen.3：源码内容

							.TH "SDL_JoystickOpen" "3" "Tue 11 Sep 2001, 23:00" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_JoystickOpen- Opens a joystick for use&.
.SH "SYNOPSIS"
.PP
fB#include "SDL&.h"
.sp
fBSDL_Joystick *fBSDL_JoystickOpenfPfR(fBint indexfR);
.SH "DESCRIPTION"
.PP
Opens a joystick for use within SDL&. The fBindexfR refers to the N&'th joystick in the system&. A joystick must be opened before it game be used&.
.SH "RETURN VALUE"
.PP
Returns a fBSDL_JoystickfR structure on success&. fBNULLfR on failure&.
.SH "EXAMPLES"
.PP
.PP
.nf
f(CWSDL_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);
}fR
.fi
.PP
.SH "SEE ALSO"
.PP
fIfBSDL_JoystickClosefPfR
..." created by instant / docbook-to-man, Tue 11 Sep 2001, 23:00

						