Problems compiling world's easiest program

Hi, I'm having trouble compiling my program.

main.cpp file:

Code:

#include <iostream>

#include "Test.h"

using namespace std;

int main()
{
   Test a;
   a.printSomething();
   cout << "Hello World" ;
   return 0;
}

Test.h file:

Code:

#ifndef TEST_H
#define TEST_H

class Test
{
public:
   void printSomething();
};
#endif

Test.cpp file:

Code:

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

using namespace std;

void Test::printSomething();
{
   cout << "Hi";
}

If I comment a.printSomething(); in my main.cpp file, I won't get compilation errors.

But if I do, I get a "Undefined first referenced symbol in file" error

Can anyone help?

Okay, compiling with
g++ main.cpp Test.cpp
gives me no errors.

But if I compile using
g++ main.cpp Test.h
I do get errors.

Which is the correct way to compile?

Code:

#include "Test.h"

should be after

Code:

using namespace std;

Irrelevant. However, you have an extra semi-colon in test.cpp.

>> Which is the correct way to compile?
g++ main.cpp Test.cpp

Only compile your .cpp files. The .h files are included in them already and will be compiled automatically.

>> #include "Test.h" should be after using namespace std;
It's fine where it is. In fact I'd say it should not be after using namespace std.

>> It's fine where it is. In fact I'd say it should not be after using namespace std.
On my compiler, it would have to be after using namespace std; but it's outdated so if it's incorrect, I'm sorry.

>> On my compiler, it would have to be after using namespace std; but it's outdated so if it's incorrect, I'm sorry.

Are you sure? Even on an old compiler I've never heard of something like that. The only time you would need it to be after is if you needed the std namespace available in the header file and you did not do it yourself. However, the solution to that would be to add the using directive in the header or specify std:: directly in there.

>>Are you sure? Even on an old compiler I've never heard of something like that. The only time you would need it to be after is if you needed the std namespace available in the header file and you did not do it yourself. However, the solution to that would be to add the using directive in the header or specify std:: directly in there.

Yeah. That's what it was. It's too late to be looking at code.

Originally Posted by Desolation

Irrelevant. However, you have an extra semi-colon in test.cpp.

Ouch, didn't see that.

Anyways thanks guys! Do you guys even ever sleep?

Originally Posted by markcls

Do you guys even ever sleep?

I thought to be a coder you had to give up sleep.

Originally Posted by MacGyver

I thought to be a coder you had to give up sleep.

What's that thing again ? Can I buy that on eBay ?

Originally Posted by Desolation

What's that thing again ? Can I buy that on eBay ?

LOL. Sorry to go off topic, but that reminds me so much of this hillarious Sid Caesar sketch I saw where they're doing a parody of an old movie.

Sid plays this old time 1920's style gangster that falls in love with woman who hates him and tells him she won't marry him because he's "uncouth". He turns to his goons, pulls out a load of money and says to them, "Go to the store and buy me as much couth as they got."

That still cracks me up.

OK, sorry, back to coding.

I thought that is what they put into Jolt... (sleep that is, not couth-ness)

Originally Posted by markcls

Ouch, didn't see that.

Anyways thanks guys! Do you guys even ever sleep?

We strategically placed ourselves in different timezones to provide 24 hour support.