27. Construct Sensor Packet Placement

Your firmware maintains a fixed memory pool for sensor packets because heap allocation is not allowed.

The pool can hold 3 packets, and each packet is represented by a struct SensorPacket.

You must:

• Define a struct SensorPacket with:
  • id (integer)
  • value (integer)
• Create a properly aligned memory pool capable of storing exactly 3 SensorPacket objects, ensuring that each pool slot is individually aligned for SensorPacket.
• Read:
  • An integer index (0–2) specifying which pool slot to use
  • Integer values id and value
• Use placement new to construct a SensorPacket inside the chosen pool slot.
• Print the packet’s id and value in the format:

  • id value

• Manually call the destructor for the constructed object.

Example 

Input:

1 50 900

Output:

50 900

Explanation:

• Construct a packet in pool slot 1
• id = 50, value = 900
• Output is 50 900

Constraints:

• Heap allocation is forbidden
• Placement new must be used
• Destructor must be called manually
• index will always be between 0 and 2
• Memory must be correctly aligned for each SensorPacket object