#include <stdio.h>

typedef struct _test {
    char c1, c2;
    int i;
    float f;
    union {
        double ud;
        int ui;
        char uc;
    } u;
    double d;
} test;

int main ()
{
    test t;

    printf("sizeof(test): %lu\n", sizeof(test));
    printf("sizeof(union): %lu\n", sizeof(t.u));

    printf("Address(t.c1) = %p\n", &(t.c1));
    printf("Address(t.c2) = %p\n", &(t.c2));
    printf("Address(t.i) = %p\n", &(t.i));
    printf("Address(t.f) = %p\n", &(t.f));

    printf("Address(t.u.ud) = %p\n", &(t.u.ud));
    printf("Address(t.u.ui) = %p\n", &(t.u.ui));
    printf("Address(t.u.uc) = %p\n", &(t.u.uc));

    printf("Address(t.d) = %p\n", &(t.d));

    return 0;
}