error message when trying to build classes

[Teoras]

Hi everyone, I am a newbie at programming and tired of trying to compile on visual studio i looked for an alternative a couple of days ago and code::blocks seems to be a good one, the thing is, the program runs brilliantly with small functions, but when i try to build a simple class, it gives me back the following error message:


-------------- Build: Debug in spain (compiler: GNU GCC Compiler)---------------

mingw32-g++.exe -Wall -fexceptions -g -I -c C:\Users\miguelangel\Desktop\train2game\spain\hola.cpp -o obj\Debug\hola.o
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 2 second(s))
1 error(s), 0 warning(s) (0 minute(s), 2 second(s))

now my three files are:

main.cpp:

#include <iostream>
#include "hola.h"
using namespace std;

int main()
{
hola ho;

cout << "hello world" << endl << endl;

return 0;
}
-------------------------

hola.h:

#ifndef HOLA_H
#define HOLA_H


class hola
{
public:
hola();
protected:
private:
};

#endif // HOLA_H

--------------------------

hola.cpp:

#include <iostream>
#include "hola.h"

using namespace std;

hola::hola()
{
cout << "alksjdf" << endl;
//ctor
}

--------------------

the project is set to be a console application, not a windows one, could anyone help me out with this please? i would really appreciate it as i feel like not trying to advance any deeper until i now what is happening here... thank you so much in advance

Teoras

[MiiNiPaa]

You are compiling only hola.cpp and not main.cpp. Make sure that main.cpp is in the project file list and set to be built in its properties.

[Teoras]

hi MiiNiPaa, thank you but i have just checked one by one and i got all three files with a check on compile file, to me is just not making any sense anymore... is really putting me off and is propably something really easy...

[MiiNiPaa]

with a check on compile file

What about link? Both cpp files need to be linked together to work.

[Teoras]

Yep mate all three are linked as well...

[MiiNiPaa]

!. Header file should not be compiled nor linked.
Create new console project and add all three files to it.

[Teoras]

noted, that is now unchecked and i added them both to a new console application project, still keeps giving me the exact same message:
-------------- Build: Debug in testing (compiler: GNU GCC Compiler)---------------

mingw32-g++.exe -Wall -fexceptions -g -I -c C:\Users\miguelangel\Desktop\train2game\testing\hola2.cpp -o obj\Debug\hola2.o
c:/program files (x86)/codeblocks/mingw/bin/../lib/gcc/mingw32/4.7.1/../../../libmingw32.a(main.o):main.c:(.text.startup+0xa7): undefined reference to `WinMain@16'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 2 second(s))
1 error(s), 0 warning(s) (0 minute(s), 2 second(s))

[MiiNiPaa]

Error message clearly shows that main.cpp is not compiling and linking. Does it propertires look like that: http://puu.sh/gkKYx/095d650ce1.png

[Teoras]

yes, and 50 onpriority weight, i also tried changing it to 100...

[MiiNiPaa]

And project it is in is displayed as current (bold letters)?
And you are using "build-all" button (or F9)?

[Teoras]

yes to both...

[MiiNiPaa]

Can you attach project cbp file somewhere? It is really strange, I literally just recreated your project and it works fine.

[Teoras]

Hi there bud, sorry but i just finished work i could not reply before, well the thing now is this, when i arrived before i tried to send you the copy of my project, I decided to delete the whole thing and start again, but this time instead to doing it on the GNU GCC compiler i chose visual studio 2010 and did exactly the same and it worked, it even gave me back a value for a destructor!! why do you think was happening that now bearing in mind that it was probably due to the type of compiler?
I really appreciate your help mate, thanks very much :)

[MiiNiPaa]

Maybe GCC wasn't installed properly? Or makefile got damaged.

[Teoras]

sincerely don't know buddy, but well is alright now ;) thanks again for your help!! :)