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Need some help with basic class construction

Need some help with basic class construction

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Outtey22	18 May, 2008 - 01:30 PM Post #1
New D.I.C Head Joined: 23 Sep, 2007 Posts: 27 Thanked: 1 times My Contributions	When I try to compile, I'm getting all kinds of errors regarding new types in return types. I have no idea of what this means and really need some help. CODE #include <iostream> #include <string> using namespace std; class time { public: int minute; int hour; int getHour(); int getMinute(); int addHour(); int addMinute(); time(); void printTime(); } class extTime : time { public: string timeZone; string getTimeZone(); void printTimeZone(); extTime(); } int time::getHour() { cout << "Please enter the hour:\n"; cin >> hour; return hour; } int time::getMinute() { cout << "Please enter two digits for the minutes:\n"; cin >> minute; return minute; } int time::addHour() { hour++; return hour; } int time::addMinute() { minute++; return minute; } int time::time() { hour = 0; minute = 0; } void time::printTime() { cout << "The time is " << hour << ":" << minute << "."; } string extTime::getTimeZone() { cout << "Please enter the time zone abreviation: \n"; cin >> timeZone return timeZone; } void extTime::printTimeZone() { cout << "The Time Zone is " << timeZone << ".\n"; } void extTime::extTime() { timeZone = "abc"; } int main() { time.userTime; //create user object of time class extTime.userExtTime; //create user object of extTime class userTime.time(); userTime.getHour(); userTime.getMinute(); userExtTime.extTime(); userExtTime.getTimeZone(); userTime.printTime(); userExtTime.printTimeZone(); cin.ignore(2); return EXIT_SUCCESS; }
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gabehabe	RE: Need Some Help With Basic Class Construction 18 May, 2008 - 01:42 PM Post #2
Donkey DIC Joined: 6 Feb, 2008 Posts: 5,514 Thanked: 96 times Dream Kudos: 2650 Expert In: ruling the world. My Contributions	My bet's on it being something to do with your variables not being declared You might want to try passing variables to your functions as paramaters, too (or, you could have them as members in your class) Hope this helps
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skater_00

RE: Need Some Help With Basic Class Construction
18 May, 2008 - 01:44 PM

Post #3

D.I.C Head

Joined: 30 Apr, 2008
Posts: 173

Windows

Thanked: 4 times
Dream Kudos: 50
My Contributions

Try this:

cpp


#include <iostream>
#include <string>

using namespace std;

class time
{
public:
	time();
	int getHour();
	int getMinute();
	int addHour();
	int addMinute();
	void printTime();

private:
	int hour, minute;
};

class extTime
{
public:
	extTime();
	string getTimeZone();
	void printTimeZone();

private:
	string timeZone;
};

time::time():hour(0), minute(0)
{

}

int time::getHour()
{
    cout << "Please enter the hour: ";
    cin >> hour;
    return hour;
}

int time::getMinute()
{
    cout << endl << "Please enter two digits for the minutes: ";
    cin >> minute;
    return minute;
}

int time::addHour()
{
    ++hour;
    return hour;
}

int time::addMinute()
{
    ++minute;
    return minute;
}

void time::printTime()
{
     cout << endl << "The time is " << hour << ":" << minute << ".";
}

extTime::extTime():timeZone("abc")
{

}

string extTime::getTimeZone()
{
       cout << endl << "Please enter the time zone abreviation: ";
       cin >> timeZone;
       return timeZone;
}

void extTime::printTimeZone()
{
     cout << endl << endl << "The time zone is " << timeZone << "." << endl << endl;
}

int main()
{
    time * userTime = new time();
    extTime * userExtTime = new extTime();
    userTime->getHour();
    userTime->getMinute();
    userExtTime->getTimeZone();
    userTime->printTime();
    userExtTime->printTimeZone();
    
    system("PAUSE");

    delete userTime;
    delete userExtTime;

    return 0;
}

This post has been edited by skater_00: 18 May, 2008 - 01:48 PM

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Outtey22	RE: Need Some Help With Basic Class Construction 18 May, 2008 - 01:44 PM Post #4
New D.I.C Head Joined: 23 Sep, 2007 Posts: 27 Thanked: 1 times My Contributions	Wow... I feel like a tool. Let me tweak it and see where we're at.
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Outtey22	RE: Need Some Help With Basic Class Construction 18 May, 2008 - 02:22 PM Post #5
New D.I.C Head Joined: 23 Sep, 2007 Posts: 27 Thanked: 1 times My Contributions	Thanks for the help guys! I tried to use the code that skater posted but I was still getting errors. After thinking about it for a minute, I realized that it was pointless to make a time object since an extTime object would have the inheritance of time. I tweaked it a bit and got it to work. Thanks for the help guys! CODE #include <iostream> #include <string> using namespace std; class time { public: time(); int getHour(); int getMinute(); int addHour(); int addMinute(); void printTime(); private: int hour, minute; }; class extTime : public time { public: extTime(); string getTimeZone(); void printTimeZone(); private: string timeZone; }; time::time():hour(0), minute(0) { } int time::getHour() { cout << "Please enter the hour: "; cin >> hour; return hour; } int time::getMinute() { cout << endl << "Please enter two digits for the minutes: "; cin >> minute; return minute; } int time::addHour() { ++hour; return hour; } int time::addMinute() { ++minute; return minute; } void time::printTime() { cout << endl << "The time is " << hour << ":" << minute << "."; } extTime::extTime():timeZone("abc") { } string extTime::getTimeZone() { cout << endl << "Please enter the time zone abreviation: "; cin >> timeZone; return timeZone; } void extTime::printTimeZone() { cout << endl << endl << "The Time Zone is " << timeZone << "." << endl << endl; } int main() { extTime userExtTime; userExtTime.getHour(); userExtTime.getMinute(); userExtTime.getTimeZone(); userExtTime.printTime(); userExtTime.printTimeZone(); system("PAUSE"); return 0; }
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skater_00	RE: Need Some Help With Basic Class Construction 18 May, 2008 - 02:34 PM Post #6
D.I.C Head Joined: 30 Apr, 2008 Posts: 173 Thanked: 4 times Dream Kudos: 50 My Contributions	That's good. The code I posted worked just fine here though, but it has to work for you in the end. Feel free to post any questions that are bugging you.
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