personType.cpp|86 col 5 error| type ‘personType’ is not a direct base of ‘docterType’$

class inheritance

#include <iostream>
#include <string>

using namespace std;

class personType
{
public:
    void print() const;
    //Function to output the first name and last name
    //in the form firstName lastName.
    void setName(string first, string last);
    //Function to set firstName and lastName according
    //to the parameters.
    //Postcondition: firstName = first; lastName = last;
    string getFirstName() const;
    //Function to return the first name.
    //Postcondition: The value of firstName is returned.
    string getLastName() const;
    //Function to return the last name.
    //Postcondition: The value of lastName is returned.
    personType(string first = "", string last = "");
    personType();
    //Constructor
    //Sets firstName and lastName according to the parameters.
    //The default values of the parameters are null strings.
    //Postcondition: firstName = first; lastName = last;

    string firstName; //variable to store the first name
    string lastName; //variable to store the last name
};

void personType::print() const
{
    cout << firstName << " " << lastName;
}
void personType::setName(string first, string last)
{
    firstName = first;
    lastName = last;
}
string personType::getFirstName() const
{
    return firstName;
}
string personType::getLastName() const
{
    return lastName;
}
//constructor
personType::personType(string first, string last)
{
    firstName = first;
    lastName = last;
}



class docterType
{
    /* -----------------$$( Constructor )$$-----------------*/
    docterType(string ilast, string ifirst, string ispecility);
    docterType();
    /* -----------------$$( datamembers )$$-----------------*/
    string specility;
};

docterType::docterType(string ilast, string ifirst, string ispecility) :
    personType(ifirst, ilast)
{
    specility = ispecility;
}

int main()
{
    personType drew("drew","deer");
    drew.print();
}