Linking error....

Hi,

I'm doing a project, I have a file called 'Building.h' a 'Building.cpp' where I define fonction of my classes, and a 'Main.cpp'

In building.h I have:
#ifndef Batiment_H
#define Batiment_H
class{.....};
#endif


In building.cpp I have:
#include <iostream>
#include "Building.h"

in Main.cpp I have:
#include <iostream>
#include "Building.h"
and my main simply call fonction in the Building.cpp like this:
int main()
{
Building B;
B.getpiece();
B.setetage(0);
B.getetage();
return 0;

}


when I try to compile I have errors:

Linking...
main.obj : error LNK2001: unresolved external symbol "public: void __thiscall Building::getetage(void)" (?getetage@Batiment@@QAEXXZ)

main.obj : error LNK2001: unresolved external symbol "public: void __thiscall Building::setetage(int)" (?setetage@Batiment@@QAEXH@Z)

main.obj : error LNK2001: unresolved external symbol "public: void __thiscall Building::getpiece(void)" (?getpiece@Batiment@@QAEXXZ)

main.obj : error LNK2001: unresolved external symbol "public: __thiscall Building::Building(void)" (??0Batiment@@QAE@XZ)

Debug/main.exe : fatal error LNK1120: 4 unresolved externals

Error executing link.exe.

What I do wrong??? Is it really in error in linkiing files or I'm wrong???

Thx for any help!

You include building.h in your main, but I think you don't include building.cpp so functions defined there isn't available in main.cpp, you have only prototypes..

Thanks man, stupid error, but damn in the book I'm studying they did not include the *.cpp in main.... is there another way??? or i'm just stuyding in a book full of mistake???

thx mazo!

Of course there is another way, it depends on your system, for example which compiler and IDE you are using.
In Linux with gcc you can compile source in *.cpp to object *.o files and then compile main.cpp as 'gcc building.o main.cpp'..
oh sorry you should g++ or what instead gcc..
also there are some makefiles which are doing this automatically, but I don't know how to use them, I'm only a beginner :)
In DOS IDEs you have projects and such things..