I'm a newbie here and also a newbie to the allegro library.this is the code that I have problem with :

#include"allegro.h"
#include<conio.h>
#include<stdlib.h>
int main(){
allegro_init();

install_keyboard();

int ret=set_gfx_mode(GFX_AUTODETECT_WINDOWED,640,480,0,0);
if(ret!=0){
allegro_message(allegro_error);
return 0;
}

textprintf(screen, font, 0, 0, makecol(100,255,125),"%dx%d", SCREEN_W, SCREEN_H);

while(! key[KEY_ESC]);

allegro_exit();
}
END_OF_MAIN();

I copied it straight from the book yet it did not compiled perfectly.the compiler said there's an error in line 15, which is the 'textprintf line'.any help would be greatly appreciated.thank you.

And could someone show me how to distinguish the code from the text?something like

Distinguish code from text using the [ code ] tags (but with no spaces). E.g.

[ code ]
code
[ /code ]

As to the real problem — are you sure your compiler gave an error, not a warning? Can you supply the text of the error?

In general textprintf is deprecated in favour of textprintf_ex — it's recommended that you use the latter instead. For you that should be as simple as:

textprintf(screen, font, 0, 0, makecol(100,255,125), -1, "%dx%d", SCREEN_W, SCREEN_H);

What error messages do you get? textprintf is deprecated, textprintf_ex replaces it, but it should still work.

And you can enclose you code in code tags, like this:

<code>Your code here
</code>

EDIT: Well, I guess two replies are better than one, eh?

Pssst.... You forgot to rename the function:

textprintf_ex(screen, font, 0, 0, makecol(100,255,125), -1, "%dx%d", SCREEN_W, SCREEN_H);

edit:

Let me guess, the book was Game Programming All in One? Unfortunately, that book is full of errors and bad coding practices (such as including conio.h when none of the functions in that library are used).

Oh, yes, listen to LennyLen's correction to my post — don't listen to my original post.

I did as what u guys told me but it showed this error:
Compiler: Default compiler
Building Makefile: "C:\Dev-Cpp\Programming\Greet\Makefile.win"
Executing make...
mingw32-make -f "C:\Dev-Cpp\Programming\Greet\Makefile.win" all
g++.exe -c test2.c -o test2.o -I"C:/Dev-Cpp/lib/gcc/mingw32/3.4.2/include" -I"C:/Dev-Cpp/include/c++/3.4.2/backward" -I"C:/Dev-Cpp/include/c++/3.4.2/mingw32" -I"C:/Dev-Cpp/include/c++/3.4.2" -I"C:/Dev-Cpp/include"

g++.exe test1.o test2.o Project1_private.res -o "Project1.exe" -L"C:/Dev-Cpp/lib" -mwindows -lalleg

test2.o(.text+0x0):test2.c: multiple definition of `_mangled_main()'
test1.o(.text+0x0):test1.cpp: first defined here
test2.o(.text+0x146):test2.c: multiple definition of `WinMain@16'
test1.o(.text+0x132):test1.cpp: first defined here
collect2: ld returned 1 exit status

mingw32-make: *** [Project1.exe] Error 1

Execution terminated

this is my code:

yes,I'm using the "Game Programming All In One".I cant find any other books that's noob-friendly.

There are two object files in your project, even though you appear to only have one source file. Did you originally have a file in your project called test1.c that you removed and replaced with a new file called test2.c?

Try creating a new project, as the code you just posted compiles as expected (no errors, just a warning).

Don't use a semi-colon after END_OF_MAIN() , it's not supposed to be there.

Hmmm that is weird... I have always put a semi-colon after END_OF_MAIN and it works fine.

END_OF_MAIN() manual entry - It may work but it still doesn't belong there. It's a define , not a statement that needs to be ended with a semi-colon.

#define SOME_CODE \
for (int i = 0 ; i < 10 ; i++) {do_stuff();} 

// Which of the next two statements would be correct?
SOME_CODE

SOME_CODE;

As you can see , the semi-colon would be inappropriate there.

END_OF_MAIN() is a platform specific #define so there are several possible definitions.
Here is the one from alwin.h :

So you can see that it doesn't need a semi-colon there.