Symbol not found Error

[hajjboy95]

Being a beginner in c++ coming from a java background ,
I find the inheritance in c++ a bit confusing to implement.
I looked up at tutorials but none seemed to fix my problem .

Im trying to implement an alarm clock and normal clock .
Its a very basic program , heres the code for 3 of the classes , note in my program clock is a superclass of Normal Clock and Normal Clock is a superClass of Alarm Clock.

Clock.h
  class Clock
{
public:
    virtual void tick() = 0;
    void print() ;
    void setTime(int sec , int mins , int hours);
    int hour;
    int minute;
    int second;
    Clock();
    ~Clock();
};
clock.cpp

void Clock::print() {
    cout << hour <<":" << minute << ":" << second << endl;
}
void Clock::setTime(int sec , int mins , int hours) {
    second = sec;
    minute = mins ;
    hour = hours;

    if (second > 59) {
        second = 0 ;
        minute++;
    }
    if (minute > 59) {
        minute = 0;
        hour++ ;
    }
    if ( hour > 23)
        hour = 0;
}
Clock::Clock() {
    hour = 0 , minute = 0 , second = 0;
}
NormalClock.h

class NormalClock : public Clock
{
public:
    void tick() ;
    NormalClock();
    ~NormalClock();
};
NormalClock.cpp

 void NormalClock::tick() {
    second +=1 ;
    setTime(second,minute,hour);
}
AlarmClock.h

class AlarmClock : public NormalClock
{
public:
    int alarmSecond, alarmMinute, alarmHour;
    void tick();
    void checkTime();
    AlarmClock(); 
    ~AlarmClock();
};  
AlarmClock.cpp

 void AlarmClock::tick() {
    NormalClock::tick();
    checkTime();
}
void checkTime() {
    cout << "HELLO CHECKTIME" << endl;
}

I left out the constructors , destructors and imports to make it easier.

[rafae11]

I am guessing that your code does not compile and that is the problem.

I modified the code you posted so that it compiles.

http://cpp.sh/8n3q

[tipaye]

What's your question?

[MiiNiPaa]

1) I do not see you including "clock.h" in NormalClock.h and "NormalClock.h" in AlarmClock.h
2) Did you add .cpp files to the project files (if you are using IDE)?

[hajjboy95]

Thank you very much rafae11 ,
That helped a lot and worked ,
Your code runs perfectly!

just wondering what did you change in the code to make it compile because I cant fiind the part you changed.

And sorry for not clarifying the question clearly , the code wasn't compiling :D

Thanks again for the help,

peace,

[rafae11]

//i just changed void checkTime()  to 

void AlarmClock::checkTime()