Cant cout a string - c++

Question

I am using this code
#include <iostream>
class person
{
class address
{
public:
std::string addr;
int pobox;
address()
{
addr = "Some Address";
pobox = 200;
}
};
address a;;
void Test()
{
std::cout << a.addr; //ERROR
}
};
int main()
{
}
I get this error
Error 1 error C2679: binary '<<' : no operator found which takes a
right-hand operand of type 'std::string' (or there is no acceptable
conversion)
Any suggestions on how i can fix it ?

Answer 1

You may want to do an include for string:
#include <string>

Answer 2

Besides including the <string> header as mentioned, I think the rest needs to be fixed, like follows:
#include <iostream>
#include <string>
class person {
class address {
public: // <<<<<<<<<<<<<<<
std::string addr;
int pobox;
address() {
addr = "Some Address";
pobox = 200;
}
};
address a;
public: // <<<<<<<<<<<<<<<
void Test() {
std::cout << a.addr;
}
};
int main() {
person p;
p.Test();
return 0;
}
See the Live Demo.
You'll need to make the class members in question publicly visible, to instantiate or call them.
You may declare address as a nested type of person (at least public to become useful), though I'm not so sure that this is such a good idea.
The much better approach seems to be declaring a own, self contained address class outside of person, and have the latter one contain a member for it:
class address {
public:
address() : addr_("Some Address"), pobox_(200) {}
const std::string& addr() const { return addr_; }
void addr(std::string value) { addr_ = value; }
int pobox() const { return pobox_; }
void pobox(int value ) { pobox_ = value; }
private:
std::string addr_;
int pobox_;
};
class person {
address a_;
public:
void Test() {
std::cout << "Address: " << a_.addr() << std::endl;
std::cout << "PO Box : " << a_.pobox() << std::endl;
}
};
int main() {
person p;
p.Test();
return 0;
}
See another Live Demo.