shows error when creating class DATA in Xcode for c project

no-reply@allegro.cc (xtech45) — Thu, 02 Jan 2014 12:08:18 +0000

#include
#include

class DATA {
public :
ALLEGRO_MUTEX *mutex;
ALLEGRO_COND *cond;
float posiX;
float posiY;
bool modi_x;
bool ready;
DATA() :
mutex(al_create_mutes()),
cond(al_create_cond()),
posiX(0);
posiY(0);
modi_X(false),
ready(false){}
-DATA()
{
al_destroy_mutex(mutex);
al_destroy_cond(cond);
}
};

const float FPS =30;
const int SCREEN_H =640;

int main()
{

return 0;
}

the following error appears when i type this in Xcode and the language is c

1) Excepted ';' after top level deflator
2) unknown type name class

why is this happening and should i need to include any header or is there any work around for this

no-reply@allegro.cc (Edgar Reynaldo) — Thu, 02 Jan 2014 23:23:08 +0000

xtech45 said:

DATA() :
mutex(al_create_mutes()),
cond(al_create_cond()),
posiX(0);
posiY(0);
modi_X(false),
ready(false){}

Look right after posiX(0) and posiY(0) - you used two semicolons instead of commas.

no-reply@allegro.cc (xtech45) — Fri, 03 Jan 2014 02:24:48 +0000

I have changed that and i still get the same error and it shows an error at the starting itself stating UNKNOWN TYPE NAME and EXPECTED SEMICOLON

under which header does the class comes

no-reply@allegro.cc (Edgar Reynaldo) — Fri, 03 Jan 2014 06:55:22 +0000

You also mis-spelled al_create_mutex as mutes. There are probably other things too. Post the whole code, use code tags. code goes here

no-reply@allegro.cc (xtech45) — Fri, 03 Jan 2014 16:18:00 +0000

#SelectExpand
  1
  2#include 
  3#include 
  4
  5class DATA {
  6   
  7    public :
  8    
  9    ALLEGRO_MUTEX *mutex;
 10    ALLEGRO_COND *cond;
 11    float posiX;
 12    float posiY;
 13    bool  modi_x;
 14    bool  ready;
 15    DATA() :
 16    mutex(al_create_mutes()),
 17    cond(al_create_cond()),
 18    posiX(0),
 19    posiY(0),
 20    modi_X(false),
 21    ready(false){}
 22    -DATA()
 23    {
 24        al_destroy_mutex(mutex);
 25        al_destroy_cond(cond);
 26    }
 27};
 28
 29const float FPS =30;
 30const int SCREEN_H =640;
 31
 32int main()
 33{
 34
 35    return 0;
 36}

this is actually a tutorial from the allegro site itself and
http://wiki.allegro.cc/index.php?title=Allegro_5_Tutorial/Threads
this is the link of the code

no-reply@allegro.cc (Elias) — Fri, 03 Jan 2014 17:25:27 +0000

It's "~DATA" not "-DATA". What if you just copy and paste the complete tutorial?

no-reply@allegro.cc (Thomas Fjellstrom) — Fri, 03 Jan 2014 17:38:07 +0000

Also make sure you created the file as a c++ file, rather than c.

no-reply@allegro.cc (Edgar Reynaldo) — Fri, 03 Jan 2014 21:23:13 +0000

xtech45 said:

this is actually a tutorial from the allegro site itself and
http://wiki.allegro.cc/index.php?title=Allegro_5_Tutorial/Threads
this is the link of the code

yes, but the tutorial doesn't have those errors...

no-reply@allegro.cc (xtech45) — Fri, 03 Jan 2014 23:07:26 +0000

#SelectExpand
   1#include 
   2#include 

   4class DATA{

 public:

    ALLEGRO_MUTEX *mutex;
    ALLEGRO_COND  *cond;
    float          posiX;
    float          posiY;
    bool           modi_X;
    bool           ready;

 DATA() : mutex(al_create_mutex()),
          cond(al_create_cond()),
          posiX (0),
          posiY (0),
          modi_X(false),
          ready (false) {}

 ~DATA(){

    al_destroy_mutex(mutex);
    al_destroy_cond(cond);

 }

  29};

  31const float FPS        = 30;
  32const int SCREEN_W     = 640;
  33const int SCREEN_H     = 480;
  34const int BOUNCER_SIZE = 32;

  36static void *Func_Thread(ALLEGRO_THREAD *thr, void *arg);

  38int main(int argc, char **argv){

 ALLEGRO_DISPLAY     *display     = NULL;
 ALLEGRO_EVENT_QUEUE *event_queue = NULL;
 ALLEGRO_TIMER       *timer       = NULL;
 ALLEGRO_BITMAP      *bouncer     = NULL;
 ALLEGRO_THREAD      *thread_1    = NULL;
 ALLEGRO_THREAD      *thread_2    = NULL;

 bool redraw = true;

 if(!al_init()) {
    fprintf(stderr, "failed to initialize allegro!\n");
    return -1;
 }

 if(!al_install_mouse()) {
    fprintf(stderr, "failed to initialize the mouse!\n");
    return -1;
 }

 timer = al_create_timer(1.0 / FPS);
 if(!timer) {
    fprintf(stderr, "failed to create timer!\n");
    return -1;
 }

 display = al_create_display(SCREEN_W, SCREEN_H);
 if(!display) {
    fprintf(stderr, "failed to create display!\n");
    al_destroy_timer(timer);
    return -1;
 }

 bouncer = al_create_bitmap(BOUNCER_SIZE, BOUNCER_SIZE);
 if(!bouncer) {
    fprintf(stderr, "failed to create bouncer bitmap!\n");
    al_destroy_display(display);
    al_destroy_timer(timer);
    return -1;
 }

 al_set_target_bitmap(bouncer);
 al_clear_to_color(al_map_rgb(255, 0, 255));
 al_set_target_bitmap(al_get_backbuffer(display));
 event_queue = al_create_event_queue();

 if(!event_queue) {
    fprintf(stderr, "failed to create event_queue!\n");
    al_destroy_bitmap(bouncer);
    al_destroy_display(display);
    al_destroy_timer(timer);
    return -1;
 }

 al_register_event_source(event_queue, al_get_display_event_source(display));
 al_register_event_source(event_queue, al_get_timer_event_source(timer));
 al_register_event_source(event_queue, al_get_mouse_event_source());
 al_clear_to_color(al_map_rgb(0,0,0));
 al_flip_display();
 al_start_timer(timer);

 DATA data;

 thread_1 = al_create_thread(Func_Thread, &data);
 al_start_thread(thread_1);

 al_lock_mutex(data.mutex);
 while (!data.ready){

    al_wait_cond(data.cond, data.mutex);

 }
 al_unlock_mutex(data.mutex);

 al_lock_mutex(data.mutex);
 data.modi_X = true;
 data.ready  = false;
 al_unlock_mutex(data.mutex);

 thread_2 = al_create_thread(Func_Thread, &data);
 al_start_thread(thread_2);

 al_lock_mutex(data.mutex);
 while (!data.ready){

    al_wait_cond(data.cond, data.mutex);

 }
 al_unlock_mutex(data.mutex);


 while(1)
 {
    ALLEGRO_EVENT ev;
    al_wait_for_event(event_queue, &ev);

    if(ev.type == ALLEGRO_EVENT_TIMER) {
       redraw = true;
    }
    else if(ev.type == ALLEGRO_EVENT_DISPLAY_CLOSE) {
       break;
    }
    else if(ev.type == ALLEGRO_EVENT_MOUSE_BUTTON_DOWN) {
       break;
    }
    if(redraw && al_is_event_queue_empty(event_queue)) {
       redraw = false;

       al_lock_mutex(data.mutex);
       float X = data.posiX;
       float Y = data.posiY;
       al_unlock_mutex(data.mutex);

       al_draw_bitmap(bouncer, X, Y, 0);

       al_flip_display();
    }
 }
 al_destroy_thread(thread_1);
 al_destroy_thread(thread_2);

 al_destroy_bitmap(bouncer);
 al_destroy_timer(timer);
 al_destroy_display(display);
 al_destroy_event_queue(event_queue);

 return 0;
 166}

 static void *Func_Thread(ALLEGRO_THREAD *thr, void *arg){

 DATA *data  = (DATA*) arg;
 float num   = 0.1;

 al_lock_mutex(data->mutex);

 bool modi_X = data->modi_X;
 data->ready = true;
 al_broadcast_cond(data->cond);

 al_unlock_mutex(data->mutex);

 while(!al_get_thread_should_stop(thr)){

    al_lock_mutex(data->mutex);
    if(modi_X)
       data->posiX += num;
    else
       data->posiY += num;
    al_unlock_mutex(data->mutex);

    al_rest(0.01);

 }


 return NULL;
 }

this is entire code and even after saving it as c++ file i get the same error
can anyone sort this out

no-reply@allegro.cc (Arthur Kalliokoski) — Fri, 03 Jan 2014 23:13:21 +0000

I don't get any errors compiling that. Which compiler are you using, what options or command line etc.?

[EDIT]

nevermind

xtech45 said:

when i type this in Xcode and the language is c

It has to be compiled as C++. I don't know what Xcode is, try g++.

no-reply@allegro.cc (xtech45) — Fri, 03 Jan 2014 23:27:50 +0000

hmm okay will try it from that , but you need to include all the library into the g++ compiler before compiling it right

no-reply@allegro.cc (Arthur Kalliokoski) — Fri, 03 Jan 2014 23:31:09 +0000

xtech45 said:

you need to include all the library into the g++ compiler before compiling it right

Which library? Allegro? You have to link it in somewhere to get an executable, even with C.

no-reply@allegro.cc (xtech45) — Fri, 03 Jan 2014 23:50:01 +0000

ya allegro only and how do i link it and is there any links or guidance for how to link it to get an executable

no-reply@allegro.cc (gezegond) — Sat, 04 Jan 2014 01:51:45 +0000

xcode is for iOS development afaik.

https://en.wikipedia.org/wiki/Xcode