cpp Abstract class

Question

I am getting an error

error: cannot allocate an object of abstract type 'myClass'

I have made made up a small sample to demonstrate my error. Below is the code. (includes and #ifndef stuff is not included)

person.h

class Person{
    public:
            virtual std::string getRole() = 0;
};

employee.h

class Employee:public Person{
    std::string getRole();
};

workplace.h

class Workplace{
    public:
            void  setPeople(std::vector<Person> p);

    private:
            std::vector<Person> people;
};

workplace.cpp

void Workplace::setPeople(std::vector<Person> p){
    people = p;
}

employee.cpp

std::string Employee::getRole(){
    return "Generic Employee";
}

The error I am getting from this example is:

/usr/lib/gcc/x86_64-redhat-linux/4.4.7/../../../../include/c++/4.4.7/bits/stl_construct.h:80: error: cannot allocate an object of abstract type ‘Person’ person.h:7: note: because the following virtual functions are pure within ‘Person’: person.h:9: note: virtual std::string Person::getRole()

Thanks in advance.