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Date Class Questions

nikg prog (4)
Hello! I'm doing a bit of homework working with classes. The goal is to create a Date class that store a calendar date. I'm having a bit of trouble writing the member functions for the class specifically Show(), SetFormat(), and Compare(). The requirements for the member functions are as follows. Show( ): output date to screen; there is more than one possible format and the class needs to store the format setting. Show should use format setting to determine output. Should start in "default"; possible formats should include: 1. M/D/Y 2. mm/dd/yy 3. month D, Y (ex. Oct 13, 2014).
I'd like to know what it means by "store a format setting" and how to accomplish this. Where do I store it? Another function? SetFormat(): allows to change format setting. For this I would like to know how write it so that when a letter is entered it will display in format until changed again. Lastly, Compare(): function should compare two Date objects (the calling object and the parameter), and should return: -1 if the calling object comes first chronologically, 0 if the objects are the same date, and 1 if the parameter object comes first chronologically. I just don't know how to code it to compare two objects. It's a work in progress so I apologize for the mess. I included a commented out block at the end for when I was trying to work on the Setformat() function. I think I was on to something. Any and all help is appreciated!
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  //------------------DATE.CPP-------------------------
//class definition for dates
//

#include <iostream>
#include "date.h"

using namespace std;

Date::Date(int month, int day, int year)
{
	if (true)
		Input();
	else
		Date();
}

Date::Date()
{
	month = 1;
	day = 1;
	year = 2000;

}

void Date::Input()
{
	cout << "Please input a date!";
	cin >> month;
	cin >> "/";
	cin >> day;
	cin >> "/";
	cin >> year;
	//should this be entered as a string? 

	if((month < 1) || (month > 12))
	{
		cout << "Invalid entry." << endl;
	}
	if ((day < 1) || (day > 31))
	{
		cout << "Invalid entry." << endl;
	}
	if (year < 0)
	{
		cout << "Invalid entry." << endl;
	}

}

void Date::show()
{
	cout << month << '/' << day << '/' << year;
	// do I pass in SetFormat()? how?

}

bool Date::Set(int m, int d, int y)
{
	if (true)
	{
		if (month >= 1 && month <= 12)
		{
			cin >> m;
			month = m;
		}
		if (day >= 1 && day <= 31)
		{
			cin >> d;
			day = d;
		}
		if (year >= 0)
		{
			cin >> y; 
			year = y;
		}
	}
	else
	{
		abort;
	}
}

int Date::GetMonth()
{
	return month;
}

int Date::GetDay()
{
	return day;
}

int Date::GetYear()
{
	return year;
}

bool Date::SetFormat(char f)
{
	cin >> f;

	switch(f)
	{
		case 1:
			f = 'D';
			cout << "Default format selected! ";
			break;
		case 2:
			f = 'T';
			cout << "Two-Digit format selected! ";
			break;
		case 3:
			f = 'L';
			cout << "Long format selected! ";
			break;
		default:
			f = 'D';
			break;
	}
}

void Date::Increment(int numDays = 1)
{

}

int Date::Compare(const Date& d)
{

}

/*
switch(int month)
{
	case 1:
		if(month == 1 || 01);
		cout << "Jan";
		break;
	case 2:
		if(month == 2 || 02);
		cout << "Feb";
		break;
	case 3:
		if(month == 3 || 03);
		cout << "Mar";
		break;
	case 4:
		if(month == 4 || 04);
		cout << "Apr";
		break;
	case 5:
		if(month == 5 || 05);
		cout << "May";
		break;
	case 6:
		if(month == 6 || 06);
		cout << "June";
		break;
	case 7:
		if(month == 7 || 07);
		cout << "July";
		break;
	case 8:
		if(month == 8 || 08);
		cout << "Aug";
		break;
	case 9:
		if(month == 9 || 09);
		cout << "Sept";
		break;
	case 10:
		if(month == 10);
		cout << "Oct";
		break;
	case 11:
		if(month == 11);
		cout << "Nov";
		break;
	case 12:
		if(month == 12);
		cout << "Dec";
		break;
}
*/
Last edited on
coder777 (8444)
should this be entered as a string?
No, it's ok that way.

do I pass in SetFormat()? how?
No, but you should take f into account when printing the date. f is supposed to be a member of the class.

I just don't know how to code it to compare two objects.
First compare year. If the is not equal you found the answer already. If it is equaly compare month...
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if(d.year < year)
  return -1;
else if(d.year > year)
  return 1;
else if(d.month < month)
  ...

return 0;
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