[Dev-C++] allegro problem

[neo <de...@ey...>]

I downloaded the allegro through WebUpdate Module,and installed it,but there
is a problem when i tried compiling the example program named exhello.c.the
code of the example program as below:

/************************************************************************/

#include "allegro.h"







int main()

{

   /* you should always do this at the start of Allegro programs */

   allegro_init();



   /* set up the keyboard handler */

   install_keyboard(); 



   /* set a graphics mode sized 320x200 */

   if (set_gfx_mode(GFX_SAFE, 320, 200, 0, 0) != 0) {

      set_gfx_mode(GFX_TEXT, 0, 0, 0, 0);

      allegro_message("Unable to set any graphic mode\n%s\n",
allegro_error);

      return 1;

   }



   /* set the color palette */

   set_palette(desktop_palette);



   /* clear the screen to white */

   clear_to_color(screen, makecol(255, 255, 255));



   /* you don't need to do this, but on some platforms (eg. Windows) things

    * will be drawn more quickly if you always acquire the screen before

    * trying to draw onto it.

    */

   acquire_screen();



   /* set transparent text */

   text_mode(-1);



   /* write some text to the screen with black letters */

   textout_centre(screen, font, "Hello, world!", SCREEN_W/2, SCREEN_H/2,
makecol(0,0,0));



   /* you must always release bitmaps before calling any input functions */

   release_screen();



   /* wait for a keypress */

   readkey();



   return 0;

}



END_OF_MAIN();

/****************************end*****************************************/

the error information(devcpp): 

Compiler: Default compiler

Executing  gcc.exe...

gcc.exe "C:\My Documents\Untitled1.c" -o "C:\My Documents\Untitled1.exe"   
-I"D:\DEV-CPP\include"   -L"D:\DEV-CPP\lib"

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x4f):Untitled1.c: undefined reference to
`install_allegro'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x57):Untitled1.c: undefined reference to
`install_keyboard'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x72):Untitled1.c: undefined reference to
`set_gfx_mode'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x8b):Untitled1.c: undefined reference to
`set_gfx_mode'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x97):Untitled1.c: undefined reference to
`_imp__allegro_error'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xa1):Untitled1.c: undefined reference to
`allegro_message'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xb9):Untitled1.c: undefined reference to
`_imp__desktop_palette'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xbe):Untitled1.c: undefined reference to
`set_palette'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xdb):Untitled1.c: undefined reference to
`makecol'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xe4):Untitled1.c: undefined reference to
`_imp__screen'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xeb):Untitled1.c: undefined reference to
`clear_to_color'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xf3):Untitled1.c: undefined reference to
`acquire_screen'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0xfd):Untitled1.c: undefined reference to
`text_mode'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x111):Untitled1.c: undefined reference to
`makecol'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x11a):Untitled1.c: undefined reference to
`_imp__gfx_driver'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x124):Untitled1.c: undefined reference to
`_imp__gfx_driver'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x14a):Untitled1.c: undefined reference to
`_imp__gfx_driver'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x154):Untitled1.c: undefined reference to
`_imp__gfx_driver'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x17f):Untitled1.c: undefined reference to
`_imp__font'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x186):Untitled1.c: undefined reference to
`_imp__screen'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x18d):Untitled1.c: undefined reference to
`textout_centre'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x195):Untitled1.c: undefined reference to
`release_screen'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x19a):Untitled1.c: undefined reference to
`readkey'

C:\WINDOWS\TEMP/ccqHlhgb.o(.text+0x1c5):Untitled1.c: undefined reference to
`_WinMain'



Execution terminated



who can help me ?thx anyway!






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