#include
union unmany_types {
char c;
int ivalue;
double fvalue;
double dvalue;
} unmy_union;
int main(void)
{
unmy_union.c='b';
cout << unmy_union.c << "\n";
unmy_union.ivalue=1990;
cout << unmy_union.ivalue << "\n";
unmy_union.fvalue=19.90;
cout << unmy_union.fvalue << "\n";
unmy_union.dvalue=987654.32E+13;
cout << unmy_union.dvalue << "\n";
// invalid I/O
cout << unmy_union.c << "\n";
cout << unmy_union.ivalue << "\n";
cout << unmy_union.fvalue << "\n";
cout << unmy_union.dvalue << "\n";
// union size
cout << "The size of this union is: " << sizeof(unmany_types) << " bytes." << "\n";
return (0);
}