Remember to use [] variants, because the pointer points to array.

Compiler can infer variable type from its assigned value. `auto` keyword can only be used when defining variable and assigning its value in one command. It cannot be used in function headers, or without any assigned value.

We are done with trains task.

Not covered in PA2, just a little bonus. `constexpr` marks things that are evaluated during compilation (ie. before running the program).

Macros are hard to debug. We have proper constants and functions in C++.

These are required for proper C++ code because of constructors and destructors (discussed later in semester).

It allows us to pass object directly without copying. We don't need to care about pointers, reference and dereference operators.

It is even better now.

We should use C++'s type system to our benefit. Here we can use enumeration types.

We can redefine `wagon` to something different from `int`, and we have to set constants to their proper type.

Ugly as f**k, as Mr. Gegor said.

In C++ we should use `nullptr`.

Easy as f**k.

Nowadays compilers know better.

In C++, defined names can (and should) be organized in namespaces. Standard header files use std namespace, here we use our own `helper` namespace. We must not forget to use resolution (`::`) operator when calling our helper function.

In C++, every `struct X` is defined type `X`, it is not neccessary to refer to it using `struct` keyword. But in definition, `struct` must stay, of course.

# Conflicts:
#	homework/lab01/task02/README.md