Cannot Convert Const String to Char*

[snazziosity]

I keep getting this error. What does it mean, and how can I fix it?

The error:
AddressBook.cpp:11: error: cannot convert ‘std::string’ to ‘char*’ for argument ‘1’ to ‘char* strcpy(char*, const char*)’

file snippet: AddressBook.cpp

#include "AddressBook.h"
#include <string>
#include <cstring>

using namespace std;

string firstName;

void AddressBook::SetFirstName(const string fName)
{
    strcpy(firstName, fName);
}

file snippet: AddressBook.h

#ifndef ADDRESSBOOK_H_
#define ADDRESSBOOK_H_
#include <string>
#include <cstring>

using namespace std;

class AddressBook {
private:
    string firstName;

public:
    void SetFirstName(const string fName);

};

#endif /* ADDRESSBOOK_H_ */ 

I tried looking online and in my book, but nothing was much help. Any ideas? I'd really appreciate your help!

[Null]

You can assign strings like this:

void AddressBook::SetFirstName(const string fName)
{
    firstName= fName;
}

[snazziosity]

Thank you!