Variable or field declared void C++ - c++

Question

I am making a school assignment, but I am getting a strange error. I have tried to google it, but nothing helped.
So I have a file called main.cpp. Within this file I have some includes and code.
This:
#include <iostream>
#include <stdexcept>
#include <string>
using namespace std;
#include "RentalAdministration.h"
#include "Limousine.h"
#include "Sedan.h"
void addTestDataToAdministration(RentalAdministration* administration)
{
string licencePlates[] = {"SD-001", "SD-002", "SD-003", "SD-004", "LM-001", "LM-002"};
for (int i = 0; i < 4; i++)
{
Car* sedan = new Sedan("BMW", "535d", 2012 + i, licencePlates[i], false);
administration->Add(sedan);
}
for (int i = 4; i < 6; i++)
{
Car* limousine = new Limousine("Rolls Roys", "Phantom Extended Wheelbase", 2015, licencePlates[i], true);
administration->Add(limousine);
}
}
int main( void )
{
RentalAdministration administration;
addTestDataToAdministration(&administration);
}
So the compiler tells me that the variable: "RentalAdministration administration" does not exist.
So if we have look in my rentaladministration header. We see this:
#ifndef RENTALADMINISTRATION_H
#define RENTALADMINISTRATION_H
#include <vector>
#include "car.h"
class RentalAdministration
{
private:
std::vector<Car*> Cars;
Car* FindCar(std::string licencePlate);
Car* FindCarWithException(std::string licencePlate);
public:
std::vector<Car*> GetCars() const {return Cars;}
bool Add(Car* car);
bool RentCar(std::string licencePlate);
double ReturnCar(std::string licencePlate, int kilometers);
void CleanCar(std::string licencePlate);
RentalAdministration();
~RentalAdministration();
};
#endif
This is the exact error:
src/main.cpp:18:34: error: variable or field ‘addTestDataToAdministration’ declared void
void addTestDataToAdministration(RentalAdministration* administration)
^
src/main.cpp:18:34: error: ‘RentalAdministration’ was not declared in this scope
src/main.cpp:18:56: error: ‘administration’ was not declared in this scope
void addTestDataToAdministration(RentalAdministration* administration)
Help will be appreciated!
Edit:
I am getting warnings in sublime for the Sedan and Limousine headers. Something that has to do with some static constants. I think it was called a GNU extension. Maybe it has something to do with it.
Even when I comment the call of that function out. I get the same error.
I am calling that function nowhere else.
Some people say that the cause might be in these headers:
#ifndef LIMOUSINE_H
#define LIMOUSINE_H
#include "Car.h"
//c
class Limousine : public Car
{
private:
bool needsCleaning;
bool hasMiniBar;
static const double priceperkm = 2.5;
public:
double Return(int kilometers);
void Clean();
bool GetHasMiniBar() const { return hasMiniBar;}
void SetHasMiniBar(bool value) {hasMiniBar = value;}
Limousine(std::string manufacturer, std::string model, int buildYear, std::string licencePlate, bool hasminiBar);
~Limousine();
};
#endif
2:
#ifndef SEDAN_H
#define SEDAN_H
#include "Car.h"
//c
class Sedan : public Car
{
private:
int lastCleanedAtKm;
bool hasTowBar;
bool needsCleaning;
static const double priceperKm = 0.29;
public:
void Clean();
int GetLastCleanedAtKm() const {return lastCleanedAtKm;}
void SetLastCleanedAtKm(bool value){ lastCleanedAtKm = value;}
bool GetHasTowBar() const {return hasTowBar;}
void SetHasTowBar(bool value) {hasTowBar = value;}
bool GetNeedsCleaning() const {return needsCleaning;}
void SetNeedsCleaning(bool value){needsCleaning = value;}
Sedan(std::string manufacturer, std::string model, int buildYear, std::string licencePlate, bool hastowBar);
~Sedan();
};
#endif

Answer 1

class Limousine : public Car
{
private:
static const double priceperkm = 2.5;
...
}
Remove the static and declare the member simply as const double, example:
class Limousine : public Car
{
private:
const double priceperkm = 2.5;
...
}
The error message ‘RentalAdministration’ was not declared in this scope indicates that the right header file for RentalAdministration was not included. Check the file names to make sure class declaration for RentalAdministration is in the right file.

Answer 2

Restarting the terminal has somehow solved this error. I got another error this time, which I solved already. I missed the destructor. It stood in the header file, but not in the cpp file.
Buggy terminals...