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我想編譯代碼，據說是工作代碼。我有幾個錯誤;參數的數量不匹配原型等
joystick.c: In function ‘open_joystick’:
joystick.c:14:1: error: number of arguments doesn’t match prototype
joystick.h:45:12: error: prototype declaration
joystick.c: In function ‘get_joystick_status’:
joystick.c:57:16: error: ‘struct wwvi_js_event’ has no member named ‘stick1_x’
joystick.c:59:16: error: ‘struct wwvi_js_event’ has no member named ‘stick1_y’
joystick.c:61:16: error: ‘struct wwvi_js_event’ has no member named ‘stick2_x’
joystick.c:63:16: error: ‘struct wwvi_js_event’ has no member named ‘stick2_y’
joystick.c: In function ‘open_joystick’:
joystick.c:21:1: warning: control reaches end of non-void function [-Wreturn-type]
下面是代碼
Joystick.h：
/*
(C) Copyright 2007,2008, Stephen M. Cameron.
This file is part of wordwarvi.
wordwarvi is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
wordwarvi is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with wordwarvi; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#ifndef __JOYSTICK_H__
#define __JOYSTICK_H__
#define JOYSTICK_DEVNAME "/dev/input/js0"
#define JS_EVENT_BUTTON 0x01 /* button pressed/released */
#define JS_EVENT_AXIS 0x02 /* joystick moved */
#define JS_EVENT_INIT 0x80 /* initial state of device */
struct js_event {
unsigned int time; /* event timestamp in milliseconds */
short value; /* value */
unsigned char type; /* event type */
unsigned char number; /* axis/button number */
};
struct wwvi_js_event {
int button[11];
int stick_x;
int stick_y;
};
extern int open_joystick(char *joystick_device);
extern int read_joystick_event(struct js_event *jse);
extern void set_joystick_y_axis(int axis);
extern void set_joystick_x_axis(int axis);
extern void close_joystick();
extern int get_joystick_status(struct wwvi_js_event *wjse);
#endif
Joystick.C：
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include "joystick.h"
static int joystick_fd = -1;
int open_joystick()
{
joystick_fd = open(JOYSTICK_DEVNAME, O_RDONLY | O_NONBLOCK); /* read write for force feedback? */
if (joystick_fd < 0)
return joystick_fd;
/* maybe ioctls to interrogate features here? */
return joystick_fd;
}
int read_joystick_event(struct js_event *jse)
{
int bytes;
bytes = read(joystick_fd, jse, sizeof(*jse));
if (bytes == -1)
return 0;
if (bytes == sizeof(*jse))
return 1;
printf("Unexpected bytes from joystick:%d\n", bytes);
return -1;
}
void close_joystick()
{
close(joystick_fd);
}
int get_joystick_status(struct wwvi_js_event *wjse)
{
int rc;
struct js_event jse;
if (joystick_fd < 0)
return -1;
// memset(wjse, 0, sizeof(*wjse));
while ((rc = read_joystick_event(&jse) == 1)) {
jse.type &= ~JS_EVENT_INIT; /* ignore synthetic events */
if (jse.type == JS_EVENT_AXIS) {
switch (jse.number) {
case 0: wjse->stick1_x = jse.value;
break;
case 1: wjse->stick1_y = jse.value;
break;
case 2: wjse->stick2_x = jse.value;
break;
case 3: wjse->stick2_y = jse.value;
break;
default:
break;
}
} else if (jse.type == JS_EVENT_BUTTON) {
if (jse.number < 10) {
switch (jse.value) {
case 0:
case 1: wjse->button[jse.number] = jse.value;
break;
default:
break;
}
}
}
}
// printf("%d\n", wjse->stick1_y);
return 0;
}
#if 0
/* a little test program */
int main(int argc, char *argv[])
{
int fd, rc;
int done = 0;
struct js_event jse;
fd = open_joystick();
if (fd < 0) {
printf("open failed.\n");
exit(1);
}
while (!done) {
rc = read_joystick_event(&jse);
usleep(1000);
if (rc == 1) {
printf("Event: time %8u, value %8hd, type: %3u, axis/button: %u\n",
jse.time, jse.value, jse.type, jse.number);
}
}
}
#endif
誰能告訴我什麼是錯誤的原因是我有一直試圖調試半小時，但無濟於事。