Reinitialize Object In-Place

#include <iostream>
#include <cstdint>
#include <new>

using namespace std;

struct Mode {
    int level;
};

int main() {
    int firstLevel, secondLevel;
    cin >> firstLevel >> secondLevel;

    alignas(Mode) int buffer[sizeof(Mode)];

    Mode* pointer = new (buffer) Mode{firstLevel};

    pointer->~Mode();

    pointer = new (buffer) Mode{secondLevel};

    cout << pointer->level << endl;
    pointer->~Mode();


    return 0;
}

Solving Approach