union a {
 int a_int1;
 double a_double;
 int a_int2;
};

typedef struct
{
 a a1;
 char y;
} b;

class c
{
 double c_double;
 b b1;
 a a2;
};
int main()
{
    cout << "b=" << sizeof(b)<<endl;
    cout << "c=" << sizeof(c)<<endl;
    return 0;
}