63. 8-Bit Register Class

Create a class Reg8 that simulates an 8-bit hardware register.

Class Requirements:

The class must:

1. Maintain a private uint8_t register value
2. Provide the following methods:
   • Reg8() → initializes the register to 0
   • void write(uint8_t v) → writes a new value to the register
   • uint8_t read() → returns the current register value
   • void setBit(int bit) → sets the specified bit only if bit is in range 0–7
   • void clearBit(int bit) → clears the specified bit only if bit is in range 0–7

⚠️ If bit is outside the range 0–7, the register must remain unchanged.

In main():

1. Read three integers:
   • initialValue
   • bitToSet
   • bitToClear
2. Write initialValue to the register
3. Set bitToSet
4. Clear bitToClear
5. Print the final register value as an integer

Example Input:

10
1
3

Example Output:

2

Explanation:

• initialValue = 10 = 00001010₂
• Set bit 1 → already set → unchanged
• Clear bit 3 → 00000010₂
• Final value = 2

Constraints:

• Register value must remain private
• Only class methods may modify bits
• Bit operations must be ignored for invalid indices
• Output must be exactly one integer