Programming Forums - print method

Alright, i have a program that allows users to add an employee, display employees, add a car, and display cars. These are broken into classes a car class and an employee class. The functionality of employee works fine. However, in car class when i display the cars to the screen the last line is a zero. It is this way if you add 1 car or 4 cars. I can not figure out why because i use the same method to display the cars as i do employees. Heres the code:

#include <iostream>

#include <string.h>



using namespace std;



//routines for adding a class, displaying a class, displaying id number

//displaying name

class employee

{

    private:

    char name[15];

    char emp_id[4];

    int loc;



    public:

    //constructor

    employee()

    {

        loc = 0;

    }



    //add an employee

    void addEmployee(employee emp[])

    {

        cout << "Please enter the employee name: ";

        cin >> emp[loc].name;

        cout << "Please enter the employee id: ";

        cin >> emp[loc].emp_id;

        cout << endl;

        loc++;

    }



  //display all employees

  void displayEmployees(employee emp[])

  {

    for(int i =0; i <= loc; i++)

    {

      cout << emp[i].name << " "

           << emp[i].emp_id

           << endl;

    }

  }



  //return name

  string getName()

  {

    return name;

  }



  //return emp_id

  string getEmp_id()

  {

    return emp_id;

  }

}; //end of employee  class



//routines for adding displaying cars, get for make_model and carNum

class car

{

  private:

  char make_model[15];

  char carNum[4];

  char cType[15];

  int hp;

  int loc;



  public:

  //constructor

  car()

  {

      loc = 0;

  }



  //add a car

 void  addCar(car cars[])

  {

      cout << "Enter the make_model number: ";

      cin >> cars[loc].make_model;

      cout << "Enter car number: ";

      cin >> cars[loc].carNum;

      cout << "Enter C type: ";

      cin >> cars[loc].cType;

      cout << "Enter HP number: ";

      cin >> cars[loc].hp;

      cout << endl;

      loc++;

  }



  //display cars

  void displayCar(car cars[])

  {

    for(int i =0; i <= loc; i++)

    {

        cout << cars[i].make_model << " "

             << cars[i].carNum << " "

             << cars[i].cType << " "

             << cars[i].hp

             << endl;

    }

  }



  //return make_model

  string getMake_model()

  {

    return make_model;

  }



  // return carNum

  string getCarNum()

  {

    return carNum;

  }

};  //end of car class



int main()

{

  //employee *emp;

  car *cars;

  //emp = new employee[100];

  cars = new car[100];

  //emp->addEmployee(emp);

  //emp->addEmployee(emp);

  //emp->addEmployee(emp);

  //emp->displayEmployees(emp);

  //emp->addEmployee(emp);

  //emp->addEmployee(emp);

  //emp->displayEmployees(emp);

  cars->addCar(cars);

  cars->displayCar(cars);

  //cars->addCar(cars);

  //cars->addCar(cars);

  //cars->addCar(cars);

  //cars->displayCar(cars);

  return 0;

}