Construct Sensor Packet Placement

#include <iostream>
#include <cstdint>
#include <new>
#include <type_traits>
using namespace std;

// Define the SensorPacket struct
struct SensorPacket {
    int id;
    int value;
    // Constructor
    SensorPacket(int i, int v) : id(i), value(v) {}
    // Destructor
    ~SensorPacket() {}
};

// Create a properly aligned memory pool for 3 SensorPacket objects
alignas(SensorPacket) unsigned char pool[3 * sizeof(SensorPacket)];

int main() {
    int index, id, value;
    cin >> index >> id >> value;

    // Ensure index is valid (0–2)
    if (index < 0 || index > 2) {
        cerr << "Invalid index" << endl;
        return 1;
    }

    // Calculate the address of the chosen slot
    void* slot = pool + index * sizeof(SensorPacket);

    // Construct SensorPacket using placement new
    SensorPacket* packet = new (slot) SensorPacket(id, value);

    // Print the packet’s id and value
    cout << packet->id << " " << packet->value << endl;

    // Manually call the destructor
    packet->~SensorPacket();

    return 0;
}

Solving Approach