Tutorial:

No, we won't provide any hypertext link directly to the correct code, so you get a chance to find out the solution by yourself without immediately going there  :-)))

What you should do:

• copy the code of an example onto another name (e.g. mytest.cpp)
• edit and modify mytest.cpp according to the corresponding instructions of the exercise
• compile mytest.cpp by typing make mytest at system prompt, and you will hopefully get an executable file named mytest (for Unix systems: if eventually someone tells me how to do that in Windows, apart that you'll probably end up with an executable file named mytest.exe...).

All solutions to exercises are in the same sub-dir of the Tutorial directory than the example files (i.e. Lesson1 for Lesson1, yes!) and are named exerciseN.p.cpp where N is the lesson number and p the exercise number. Hence you may browse through the code, eventually modifying it, and then simply type, in the corresponding directory,
... % make exerciseN.p
which will compile file exerciseN.p.cpp into executable exerciseN.p (for Unix systems: if eventually someone tells me how to do that in Windows, you'll probably end up with an executable file named exerciseN.p.exe).