108. Access Specifier Enforcement

C++ enforces access control using private, protected, and public at compile time. In embedded and firmware development, this is critical for preventing unsafe or unintended access to internal driver state.

You are given a small driver-style class hierarchy consisting of:

• A base driver class (BaseDriver)
• A derived driver class (DerivedDriver)

The provided program does not compile initially because it attempts to access class members in ways that violate C++ access rules.

Your task is to make the program compile by fixing only the illegal access statements, while keeping the original class design intact. This exercise focuses purely on understanding and enforcing C++ access control rules as they apply to embedded-style class hierarchies.

Rules (Strict)
You must follow all rules below:

• Do NOT modify any class definitions
• Do NOT change access specifiers
• Do NOT change inheritance type
• Do NOT add or remove functions
• Do NOT add new variables
• Do NOT introduce getters or setters
• ONLY comment out the lines that cause compilation errors

Any violation of these rules results in an invalid solution.

Input
Three integers read from standard input:

val1 val2 val3

These values are used to initialize the base class member variables via the constructor.

Example Input

1 2 3 

Program Flow (Mandatory)
Your program must execute in the exact order below:

1. Read three integers from standard input
2. Construct a DerivedDriver object
3. Call function1() (base class function)
4. Call function2() (derived class function)
5. Attempt member access from main()

The order of execution must not be changed.

Output

• The program must print output only from statements that are valid after resolving compilation errors
• Any statement that causes a compilation error must be commented out
• Only successfully compiled cout statements may produce output
• Output order must match the execution flow exactly
• Output formatting must match exactly, including spaces and newlines

Constraints

• Use inheritance only
• Use standard input/output only
• No dynamic memory allocation
• No macros or preprocessor tricks
• Output text and order must match exactly as produced by the remaining (valid) cout statements