error C2509: member function not declared in derived class [closed] - c++

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I have base class State and derived class InitialState.When i build solution compiler show error C2509: 'setView': member function not declared in 'InitialState' and I don't know why...
Here is State.h :
#ifndef STATE_H
#define STATE_H
#include<iostream>
using namespace std;
class State {
public:
State() { isPrototype = true; }
virtual void execute() = 0;
virtual void setView(ostream& screen) const = 0;
virtual void onEnter() { system("CLS"); setView(cout); }
virtual void onExit() = 0;
private:
bool isPrototype;
State* nextState;
};
#endif
InitialState.h :
#ifndef INITIAL_STATE_H
#define INITIAL_STATE_H
#include"State.h"
class InitialState : public State {
public:
void execute() {}
void onExit() {}
void setView(ostream& screen) const;
};
#endif
and InitialState.cpp:
#include"InitialState.h"
void InitialState::setView(ostream& screen) const {
screen << "Welcome!" << endl;
screen << "Please select what you want to do: " << endl << "1.Load card" << endl << "0.Exit" << endl;
}
I have tried to add key word "virtual" in the front of functions in InitialState.h , but it doesn't change anything...also when I delete InitialState.cpp the code compiles normaly.
Here is the AtmTest.cpp:
#include "PaymentCard.h"
//#include "Atm.h"
int main() {
return 0;
}
but it has nothing with State...
and here are the other classes:
Atm.h:
#ifndef ATM_H
#define ATM_H
#include<iostream>
using namespace std;
class Atm {
public:
static Atm* get();
static void release() { delete instance; instance = nullptr; } //Singleton
private:
int serialNumber;
string bankName;
string location;
//Singleton:
Atm();
static Atm* instance;
Atm(const Atm& m) = delete;
Atm& operator=(const Atm& m) = delete;
Atm(Atm&&) = delete;
Atm& operator=(Atm&& m) = delete;
};
#endif
Atm.cpp:
#include"Atm.h"
//Singleton:
Atm* Atm::instance = nullptr;
Atm* Atm::get() {
if (instance == nullptr) {
instance = new Atm();
}
return instance;
}
PaymentCard.h:
#ifndef PAYMENT_CARD_H
#define PAYMENT_CARD_H
#include<iostream>
using namespace std;
class PaymentCard {
public:
PaymentCard(string clientName);
void addMoney(unsigned int amount) { currentAmount += amount; }
void withdrawMoney(int amount);
friend ostream& operator<< (ostream&, const PaymentCard&);
private:
static int NumberGenerator;
unsigned int serialNumber;
string clientName;
int currentAmount;
};
#endif
PaymentCard.cpp:
#include"PaymentCard.h"
int PaymentCard::NumberGenerator = 0;
PaymentCard::PaymentCard(string clientName) {
currentAmount = 0;
this->clientName = clientName;
serialNumber = NumberGenerator++;
}
void PaymentCard::withdrawMoney(int amount) {
if (amount > currentAmount)cout << "Ovde ide izuzetak";
else currentAmount -= amount;
}
ostream& operator<< (ostream &os, const PaymentCard& card){
os << card.serialNumber + 1 << ". Client: " << card.clientName << endl;
return os;
}
This code is not near the finish, but it worked until i have made SetView in InitialState, so idk what happened..

Answer 1

The problem: InitialState.h is precompiled, and you are linking to a prior version of InitialState.h. Clean, rebuild, and/or disable precompiled headers altogether.
I suspect that, because:
I can reproduce the error by commenting out the declaration of setView() in InitialState.h
The resulting error message refers to line 3 of InitialState.cpp and the error message you posted refers to line 6, which indicates that the posted source code did not produce that error message.
To reproduce the error, one has to comment out the setView() decalration from the InitialState class:
class InitialState : public State {
public:
void execute() {}
void onExit() {}
//void setView(ostream& screen) const;
};
Then one gets the following error message:
1>InitialState.cpp(3): error C2509: 'setView' : member function not declared in 'InitialState'
1> c:\users\laci\desktop\samples\stackoverflow\InitialState.h(6) : see declaration of 'InitialState'