C-C++ problem

[KhaLa]

Hello guys,
I'm both new to linux and c++, and I have problems compiling and running my elementary c++ program in shell;

Main.cpp:(.text+0x1a2): undefined reference to `Second::Second(int)'
Main.cpp:(.text+0x1b5): undefined reference to `Second::setNumber(int)'
Main.cpp:(.text+0x1c0): undefined reference to `Second::printStuff()'

I keep getting this error whatever I do...
Here is the code:

---Second.h----

#include <iostream>

using namespace std;

class Second
{
public:
	Second( int );
	void printStuff();
	void setNumber( int );
private:
	int number;
};

-----Second.cpp-----

#include <iostream>

using namespace std;

#include "Second.h"

Second::Second(int a)
{
	setNumber( a );
}

void Second::printStuff()
{
	cout << "The number is: " << number << endl;
}

void Second::setNumber( int c )
{
	number = c;
}

-----Main.cpp-----

#include "Second.h"

int main()
{
	int g = 6;

	Second obj(g);
    obj.printStuff();
	obj.setNumber(4);
	obj.printStuff();
	
	return 0;
}

In shell I used "g++ Main.cpp" than I had the error above, instead of the file a.out, I think this occurs because it uses gcc instead of g++ but I dunno what to do, any bit of help is appreciated, thanks for your answers.

[conholster]

Re: C-C++ problem

In Second.h theres a extra(?) semicolon at the end. Could that be it? Havent got that much experience with C++, have only done C.

edit: thats not it. I think you need to include both .cpp files on the commmandline to gcc; g++ Main.cpp Second.cpp -o second

[KhaLa]

Re: C-C++ problem

[quote=conholster ]
In Second.h theres a extra(?) semicolon at the end. Could that be it? Havent got that much experience with C++, have only done C.
[/quote]

No, semicolon is put at the end of a class after brace, syntax is completely correct and I checked it with
[code]
g++ -c Main.cpp

Plus when you type c++ Main.cpp, it compiles, and produces an executable.
You can do the same thing with

g++ -c Main.cpp

Here is when the object file Main.o is formed

g++ -o executable Main.o

This is also the time when I get error, and if that worked I could use:

./executable

to run it, so I get the error at producing an executable file (may be called linking?)[/code]

[KhaLa]

Re: C-C++ problem

edit: thats not it. I think you need to include both .cpp files on the commmandline to gcc; g++ Main.cpp Second.cpp -o second

Oh...it worked thanks!

[conholster]

Re: C-C++ problem

No problem