Thread: Classes in C++

I totally have the imagination and even some artsyness (is that a word). Maybe graphic design would be a better choice? It's not to late for me to change what I'm doing, I've mostly done generals.

That's exactly the conclusion I came to. I decided to take a break from college to figure out my strengths overall and go back with a fresh mind. I may or may not go with a career in graphic design because I do like to think up and make things. But as of right now, I'm just going to work and save up money. Darn student loans...

Originally Posted by Elysia

Then it's just better to quit, get a book, study yourself for sometime, and if necessary, re-apply when you can next.
Members of this board will gladly help you out with self-studies if you get stuck.

I will definately do this. Learning all there is about programming in one class doesn't seem right to me, now that I think about it. I just need to take my time.

Alright. Here is the mostly completed assignment, with much help from a tutor and a little help from you guys.

CTime.cpp:

Code:

/******************************
* FILE: CTime.cpp
* PROGRAMMER: Stephen Croy
* DATE: 01-14-09
*
* Implementation of class CTime.
*******************************/
#include "CTime.h"

using namespace std;
 

CTime CTime::add(CTime t2)
{
    //Declarations
    long t1Seconds;
    long t2Seconds;
    long t3Seconds;
    CTime answer;
    
    //Conversion of hours and minutes into seconds
    t1Seconds = ((long)hours)*3600 + minutes*60 + seconds;
    t2Seconds = ((long)t2.hours)*3600 + t2.minutes*60 + t2.seconds;
    t3Seconds = t1Seconds + t2Seconds;
    
    //Conversion of seconds back to hours and minutes
    answer.hours = t3Seconds / 3600;
    answer.minutes = t3Seconds % 3600 / 60;
    answer.seconds = t3Seconds % 3600 % 60;
    
    return answer;
}

CTime.h :

Code:

/******************************
* FILE: CTime.h
* PROGRAMMER: Stephen Croy
* DATE: 01/14/09
*
* Declaration of class CTime.
*******************************/
#ifndef CTime_H
#define CTime_H
    
#include <iostream>


    class   CTime 
    {
    public:
           CTime();
           ~CTime()   {}       
           int getHours();
           int getMinutes();
           int getSeconds();
           CTime add(CTime);      
           void setHours(int);
           void setMinutes(int);
           void setSeconds(int);
           
           
    private:
            int hours;
            int minutes;
            int seconds;
    };
    
    inline CTime::CTime()
    {
           hours = 0;
           minutes = 0;
           seconds = 0;
           }
    
    inline int CTime::getHours()
    {      return hours;         }
    inline int CTime::getMinutes()
    {      return minutes;        }
    inline int CTime::getSeconds()
    {      return seconds;        }
    inline void CTime::setHours(int hr)
    {      hours = hr;              }
    inline void CTime::setMinutes(int min)
    {      minutes = min;             }
    inline void CTime::setSeconds(int sec)
    {      seconds = sec;             }
    
    #endif

and TimeApp.cpp :

Code:

#include <cstdlib>
#include <iostream>
#include "CTime.h"

using namespace std;

int main(int argc, char *argv[])
{
    char colon;
    int hrs;
    int mins;
    int secs;
    
    CTime firstT;
    CTime secondT;
    CTime answerT;
    
    cout << "Enter the first time in the format of HH:MM:SS\n\n";
    cin >> hrs >> colon >> mins >> colon >> secs;
    firstT.setHours(hrs);
    firstT.setMinutes(mins);
    firstT.setSeconds(secs);
    
    cout << "Enter the second time in the same format\n\n";
    cin >> hrs >> colon >> mins >> colon >> secs;
    secondT.setHours(hrs);
    secondT.setMinutes(mins);
    secondT.setSeconds(secs);
    
    answerT = firstT.add(secondT);
    cout << answerT.getHours();
    cout << answerT.getMinutes();
    cout << answerT.getSeconds();
     
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

Now there is a problem when I go to compile. I get this error 4 times in a row with no reference to the line number:

[Linker error] undefined reference to `CTime::CTime()'


Thank you again for all the help guys.

*shrug*

You have '~CTime' defined but not 'CTime'.

Soma