error with a string

[trumpler]

I know the error is due to string tom but im not sure how to solve it.does union not take strings or I forgot to include something?
also there is an output where it displays a box with a question mark inside.what is that?

  #include <iostream>
#include<string>
using namespace std;

int main()
{

union bob{
int tim;
char dam[12] = "hithere";
string tom;
}obj;
obj.tim = 6;
for(int x = 0;x<12;x++)
{
    cout<<obj.dam[x];
}
}

[Enoizat]

From “The C++ Programming Language” - Fourth Edition, chapter 8.3.1:

Bjarne Stroustrup wrote:

If a union has a member with a user-defined constructor, a copy operation, a move operation, or a destructor, then that special function is deleted (§3.3.4, §17.6.4) for that union; that is, it cannot be used for an object of the union type.