Fun with multiple inheritance and pointers in C++

mi.cpp

#include <cstdio>
#include <inttypes.h>

using namespace std;

class Left {
    int32_t a, b;
};

class Right {
    int32_t c, d;
};

class Bottom : public Left, public Right {
};

int main(int argc, char *argv[]) {
    Bottom *bottom = new Bottom();
    Left *left = bottom;
    Right *right = bottom;

    printf("left   -> %p\n", left);
    printf("bottom -> %p\n", bottom);
    printf("right  -> %p\n", right);

    if (left == bottom && bottom == right) {
        printf("left == bottom == right\n");
    } else {
        printf("!(left == bottom == right)\n");
    }

    return 0;
}

output.txt

% g++ -Wall -o mi mi.cpp && ./mi
left   -> 0x24dd010
bottom -> 0x24dd010
right  -> 0x24dd018
left == bottom == right

The associated blog post is here.