76. GPIO Pin Operator Overload

Create a class GpioPin that simulates a single digital GPIO pin used in embedded systems.
The pin can hold only one of two logic levels:

• LOW (0)
• HIGH (1)

The pin state must be represented using a strongly typed enumeration.

enum class Level { LOW = 0, HIGH = 1 };

The class must support intuitive read and write semantics using operator overloading, similar to how GPIO abstractions are used in embedded firmware.

Functional Requirements

Your GpioPin class must support:

✔ Writing to the pin using an overloaded assignment operator

pin = Level::HIGH;

✔ Reading the pin using an overloaded type conversion operator

int value = pin;   // must return 0 or 1 

Program Behavior

Input format

initial_level new_level

Where:

• initial_level is either 0 (LOW) or 1 (HIGH)
• new_level is either 0 (LOW) or 1 (HIGH)

Execution Steps

1. Construct a GpioPin object using initial_level
2. Assign new_level using the overloaded operator=
3. Print the final pin level as an integer (0 or 1)

Example 1

Input:

0 1

Execution Explanation:

• Initial level: LOW
• Write operation: HIGH

Output:

1

Example 2

Input:

1 0

Output:

0

Constraints

• Must use enum class Level
• Must overload:
  • operator=
  • operator int()
• No GPIO direction handling (input/output)
• No validation logic required beyond provided inputs
• Logic must remain minimal and deterministic
• No dynamic memory allocation