Placement new fun! Better make sure you align them correctly! 😈 (for a more thorough design, might need a bookkeeping array so we can reällocate)

placement_new.c++

#include <array>
#include <cstdint>
#include <iostream>
#include <string>


std::byte storage[10'000];

int main() {
    uint32_t* x = new(&storage[0]) uint32_t{1234};
    uint64_t* y = new(&storage[8]) uint64_t{196777312};
    uint16_t* z = new(&storage[16]) uint16_t{static_cast<uint16_t>(*y / *x)};
    std::string* s = new(&storage[24]) std::string{"my gumfloopens"};
    std::cout << *x << ", " << *y << ", " << *z << "; " << *s << "\n";
    s->std::string::~string();
    return *z;
}