Why can't I take the address of some elements of a struct containing multiple elements?

Why can't I take the address of the elements a and c in this struct?

#include <iostream>

struct Silly {
    char a;
    unsigned short b;
    char c;
    double d;
};

int main() {

    auto p_silly = new Silly[2];

    std::cout << "address of a: " << &(p_silly[0].a) << std::endl;
    std::cout << "address of b: " << &(p_silly[0].b) << std::endl;
    std::cout << "address of c: " << &(p_silly[0].c) << std::endl;
    std::cout << "address of d: " << &(p_silly[0].d) << std::endl;

    delete[] p_silly;
}

The output:

address of a: 
address of b: 0x61620d70c6c2
address of c: 
address of d: 0x61620d70c6c8

Compiled with:

g++ main.cpp -o main -std=c++23

It's because those members are characters. When you take the address, you're passing a char*. ostream has an overloaded operator<< that treats a char* as a NUL-terminated C string, printing the characters instead of the address. To print the address, you can cast the char* to void*.