Thread: 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?