C++ undefined symbol

Question

I am creating a C++ console application where I am saving and loading a vector to a file. The file I am saving and loading has a header that has the size of the vector.

Here is my code:

void loadFromFile()
    {
        ifstream iStream("file.ext", ios::binary);
        fileHeader_t fHeader;
        iStream.read((char*)&fHeader, sizeof(fileHeader_t));
        if (fHeader.magicNumber = 0xDEADBEAF)
        {
            appointments.resize(fHeader.appointmentCount); iStream.read((char*)&appointments[0], fHeader.appointmentCount * sizeof(appointment));
        }
    }
    void saveToFile()
    {
        ofstream oStream("file.ext", ios::binary);
        fileHeader_t fHeader;
        fHeader.magicNumber = 0xDEADBEAF;
        fHeader.appointmentCount = appointments.size();
        oStream.write((char*)&fHeader, sizeof(fileHeader_t));
        oStream.write((char*)&appointments[0], sizeof(appointment) * appointments.size());
    }

And here is the header struct:

struct fileHeader_s
{
DWORD magicNumber;
size_t appointmentsCount;
}fileHeader_t;

I am getting the following errors:

E2379 Statement missing ; E2451 Undefined symbol 'fHeader'

At the following lines:

fileHeader_t fHeader;

Why is this happening, and more importantly, how can I fix it?

Thanks

Update

Here is my full code:

class appointment
{
public:
    appointment(string aDate, string aTime, string aType,
    string aLocation, string aComments, bool aIsImportant,
    string aReminderDate, string aReminderTime)
    {
        appDate = aDate;
        appTime = aTime;
        appType = aType;
        appLocation = aLocation;
        appComments = aComments;
        appIsImportant = aIsImportant;
        appReminderDate = aReminderDate;
        appReminderTime = aReminderTime;
    }
    void setDate(string aDate)
    {
        appDate = aDate;
    }
    void setTime(string aTime)
    {
        appTime = aTime;
    }
    void setType(string aType)
    {
        appType = aType;
    }
    void setLocation(string aLocation)
    {
        appLocation = aLocation;
    }
    void setComments(string aComments)
    {
        appComments = aComments;
    }
    void setIsImportant(bool aIsImportant)
    {
        appIsImportant = aIsImportant;
    }
    void setReminderDate(string aReminderDate)
    {
        appReminderDate = aReminderDate;
    }
    void setReminderTime(string aReminderTime)
    {
        appReminderTime = aReminderTime;
    }
    string getDate()
    {
        return appDate;
    }
    string getTime()
    {
        return appTime;
    }
    string getType()
    {
        return appType;
    }
    string getLocation()
    {
        return appLocation;
    }
    string getComments()
    {
        return appComments;
    }
    bool getIsImportant()
    {
        return appIsImportant;
    }
    string getReminderDate()
    {
        return appReminderDate;
    }
    string getReminderTime()
    {
        return appReminderTime;
    }
private:
    appointment();
    string appDate;
    string appTime;
    string appType;
    string appLocation;
    string appComments;
    bool appIsImportant;
    string appReminderDate;
    string appReminderTime;
    //person owner;
};

class calendar
{
public:
    calendar()
    {
        loadFromFile();
    }
    ~calendar()
    {
        saveToFile();
    }

    void createAppointment(string aDate, string aTime, string aType, string aLocation, string aComments, bool aIsImportant, string aReminderDate, string aReminderTime)
    {
        appointment newAppointment(aDate, aTime, aType, aLocation, aComments, aIsImportant, aReminderDate, aReminderTime);
        appointments.push_back(newAppointment);
    }

private:
    vector<appointment> appointments;
    string calCurrentDate;
    string calCurrentTime;
    void loadFromFile()
    {
        ifstream iStream("file.ext", ios::binary);
        fileHeader_t fHeader;
        iStream.read((char*)&fHeader, sizeof(fileHeader_t));
        if (fHeader.magicNumber = 0xDEADBEAF)
        {
            appointments.resize(fHeader.appointmentCount); iStream.read((char*)&appointments[0], fHeader.appointmentCount * sizeof(appointment));
        }
    }
    void saveToFile()
    {
        ofstream oStream("file.ext", ios::binary);
        fileHeader_t fHeader;
        fHeader.magicNumber = 0xDEADBEAF;
        fHeader.appointmentCount = appointments.size();
        oStream.write((char*)&fHeader, sizeof(fileHeader_t));
        oStream.write((char*)&appointments[0], sizeof(appointment) * appointments.size());
    }
    typedef struct fileHeader_s
    {
        DWORD magicNumber;
        size_t appointmentCount;
    }fileHeader_t;
};

I am getting the following 2 errors:

[BCC32 Warning] Person.cpp(271): W8060 Possibly incorrect assignment Full parser context Person.cpp(245): class calendar Person.cpp(290): decision to instantiate: void calendar::loadFromFile() --- Resetting parser context for instantiation... Person.cpp(267): parsing: void calendar::loadFromFile()

[BCC32 Error] vector(608): E2247 'appointment::appointment()' is not accessible Full parser context vector(607): decision to instantiate: void vector >::resize(unsigned int) --- Resetting parser context for instantiation... Person.cpp(18): #include c:\\program files (x86)\\embarcadero\\rad studio\\9.0\\include\\dinkumware\\vector vector(8): namespace std vector(330): class vector<_Ty,_Ax> vector(607): parsing: void vector >::resize(unsigned int)

Can I please have some help to fix this?

Answer 1

You are missing the typedef keyword in struct definition.

typedef struct fileHeader_s
{

}fileHeader_t;

However, in C++ it is not required for the typedef keyword. In that case, struct name is still fileHeader_s .

Answer 2

I think what you want is a typedef

typedef struct fileHeader_s
{
DWORD magicNumber;
size_t appointmentsCount;
}fileHeader_t;