private

#include <cstdio>

class myclass {
private:
    int secret;

public:
    myclass(int i) : secret(i * 7) { }
};

struct myclone {
    int secret;
};


int main(int argc, char *argv[])
{
    myclass mc(3);
    struct myclone *cl = (struct myclone *)&mc;

    printf("%d\n", cl->secret);
    return 0;
}