I have 3 classes, GameObject, Building which inherits from GameObject, and PokemonCenter which inherits from Building. When I try to call a Building::ShowStatus() function in PokemonCenter I keep get a "invalid operands to binary expression" error.
Building.h
#ifndef BUILDING_H
#define BUILDING_H
#include "Point2D.h"
#include "GameObject.h"
class Building : public GameObject
{
private:
unsigned int pokemon_count;
public:
Building();
Building(char,int, Point2D);
void AddOnePokemon();
void RemoveOnePokemon();
void ShowStatus();
bool ShouldBeVisible();
};
#endif
Building.cpp
#include "Building.h"
#include "GameObject.h"
#include <iostream>
using namespace std;
Building::Building()
{
display_code = 'B';
location;
id_num = ' ';
state = '0';
pokemon_count = 0;
cout << "Building default constructed";
}
Building::Building(char in_code,int in_id, Point2D in_loc)
{
id_num = in_id;
location = in_loc;
display_code = in_code;
state = '0';
pokemon_count = 0;
cout << "Building constructed";
}
void Building::ShowStatus()
{
cout << "\"(" << pokemon_count << "\"pokemon is/are in this building";
}
PokemonCenter.h
#ifndef POKEMONCENTER_H
#define POKEMONCENTER_H
#include "Point2D.h"
#include "Building.h"
class PokemonCenter: public Building
{
private:
unsigned int stamina_capacity;
unsigned int num_stamina_points_remaining;
double dollar_cost_per_stamina_point;
PokemonCenter();
PokemonCenter(int,double,unsigned int, Point2D);
public:
bool HasStaminaPoints();
unsigned int GetNumStaminaPointsRemaining();
bool CanAffordStaminaPoints(unsigned int, Point2D);
double GetDollarCost(unsigned int);
unsigned int DistributeStamina(unsigned int);
bool Update();
void ShowStatus();
};
enum PokemonCenterStates
{
STAMINA_POINTS_AVAILABLE = 0,
NO_STAMINA_POINTS_AVAILABLE = 1
};
#endif
PokemonCenter.cpp
#include "PokemonCenter.h"
#include "Point2D.h"
#include "Building.h"
#include "GameObject.h"
#include <iostream>
using namespace std;
PokemonCenter::PokemonCenter()
{
id_num = ' ';
location;
display_code = 'C';
stamina_capacity = 100;
num_stamina_points_remaining = stamina_capacity;
dollar_cost_per_stamina_point = 5;
state = STAMINA_POINTS_AVAILABLE;
cout << "PokemonCenter default constructed";
}
PokemonCenter::PokemonCenter(int in_id, double stamina_cost, unsigned int stamina_cap, Point2D in_loc)
{
id_num = in_id;
location = in_loc;
dollar_cost_per_stamina_point = stamina_cost;
stamina_capacity = stamina_cap;
num_stamina_points_remaining = stamina_capacity;
state = STAMINA_POINTS_AVAILABLE;
cout << "PokemonCenter constructed";
}
void PokemonCenter::ShowStatus()
{
cout << "Pokemon Center Status: " << Building::ShowStatus() << endl;
}
The problem is that the return type of Building::ShowStatus()
is void
. operator<<
is not defined between std::ostream
and void
. Hence, you can't use
cout << "Pokemon Center Status: " << Building::ShowStatus() << endl;
Change that to:
cout << "Pokemon Center Status: ";
Building::ShowStatus();
cout << endl;
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