I am getting this error in the second constructor for Class MailCarrier.

mailcarrier.cpp(11) : error C2512: 'Employee' : no appropriate default constructor available
I'm trying to incorporate composition and inheritance into my program.
:idea:Any help would be appreciated:idea:

//MailCarrier.h


#ifndef MAILCARRIER_H
#define MAILCARRIER_H

#include "Employee.h"

#include <iostream>
using std::cout;
using std::endl;

class MailCarrier : public Employee
{
public:
    MailCarrier();
    MailCarrier( const string &, const string &, const string &, const HireDate &, double );

    void setPayRate( double );
    double getPayRate() const;

    void getHoursFromUser();

    double biWeeklySalary( double );

private:
    double payRate;
    double hours[12];
    double totalPay;
};
#endif
//MailCarrier.cpp
#include <iostream>
using std::cout;
using std::cin;
using std::endl;

#include "MailCarrier.h"

//Constructor
MailCarrier::MailCarrier()
{
    for (int i = 0; i <= 12; i++)
        hours[i] = 0;
}

//Constructor
MailCarrier::MailCarrier( const string &first, const string &last, const string &ssn,
                        const HireDate &, double pay )
    //explicitly call base-class constructor
    : Employee( first, last, ssn, HireDate  )
{
    setPayRate( pay ); // validate and store payRate
}

// function to set payRate
void MailCarrier::setPayRate( double pay )
{
    payRate = ( pay > 0.0 && pay < 35.0 ) ? pay : 17.17;
}

double MailCarrier::getPayRate() const
{
    return payRate;
}

//Function to get hours from user
void MailCarrier::getHoursFromUser()
{
    double dailyHours;

    for (int j = 0; j <= 11; j++)
    {
        cout << "Enter hours for day " << j+1 << ": ";
        cin >> hours[ j ];
    }
}//End function
//Employee.h


#ifndef EMPLOYEE_H
#define EMPLOYEE_H

#include "HireDate.h"

#include <string>
using std::string;

class Employee
{
public:
    Employee( const string &, const string &, const string &, const HireDate & );
    ~Employee();

    void setFirstName( const string & );
    string getFirstName() const; 

    void setLastName( const string & );
    string getLastName() const;

    void setSocialSecurityNumber( const string & );
    string getSocialSecurityNumber() const;

    void print() const;

private:
    string firstName;
    string lastName;
    string socialSecurityNumber;
    const HireDate hireDate;
};

#endif
//Employee.cpp

#include <iostream>
using std::cout;
using std::endl;

#include "Employee.h"
#include "HireDate.h"

//constructor
Employee::Employee(const string &first, const string &last, const string &ssn, const HireDate &dateOfHire )
    : firstName( first ), lastName( last ), socialSecurityNumber( ssn ), hireDate( dateOfHire )
{

}

Employee::~Employee()       //destructor
{

}

//function to set Employee's first name
void Employee::setFirstName( const string &first )
{
    firstName = first;
}

//function to get Employee's first name
string Employee::getFirstName() const
{
    return firstName;
}

//function to set Employee's last name
void Employee::setLastName( const string &last )
{
    lastName = last;
}

//function to get Employee's last name
string Employee::getLastName() const
{
    return lastName;
}

// function to set Employee's Social Security Number
void Employee::setSocialSecurityNumber( const string &ssn )
{
    socialSecurityNumber = ssn;
}

//function to get Employee's Social Security Number
string Employee::getSocialSecurityNumber() const
{
    return socialSecurityNumber;
}

//function to print Employee object
void Employee::print() const
{
    cout << "Employee: " << getFirstName() << ' ' << getLastName()
        << "\nSocial Security Number: " << getSocialSecurityNumber()
        << "\nDate Hired: " << &hireDate << endl;
}

MailCarrier's default constructor tries to implicitly call the base class (Employee) constructor. You need to either define a constructor for Employee that takes no arguments, or explicitly call the constructor that you do have in MailCarrier's default constructor initializer list.

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