Here’s a simple example:

#include <cstdint>

class A {
public:
  int a;
  uint16_t b;
};

#include <iostream>

int main () {
  using namespace std;
  A c;
  cout << c.a << endl;
  cout << c.b << endl;
}

I am getting random integers outputted, but from other SO answers and online — my expectation was that integers and primitives are ZERO initialized in C++. Why is this not the case?

From my understanding, for class members, the constructor is called, if applicable