help with displaying year, month, and date.

dazzer143 · #1 18-May-2005, 00:57

Hi all, I was trying to program to display Month name, date, and year.
the output should be something like this
Enter year: 2004
Enter month by using number 1 - 12 only: 1
Enter day: 1
January 1, 2004 is day number 1.
Enter year: ........... (and so on)

here are sample of my code. not sure what i did wrong...

CPP / C++ / C Code:

#include <iostream>
#include <cmath>
#include <string>
#include <algorithm>
#include <cctype>

using namespace std;

bool isLeapYear( int year );

int main()
{

    string month[13] = { "---", "January", "February", "March", "April", "May",
             "June", "July", "August", "September", "October", "November",
             "December" };
    int daysInMonth[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    int index = 0;
    int monthNumber = 0;
    int monthSubscript = 0;
    const int FEB_SUBSCRIPT = 1;
    int year = 0;
    int dayNumber = 0;
    int maxDays = 0;
    const int FEBRUARY = 2;
    int day = 0;
    const int ZERO_LIMIT = 0;
    const int YEAR_LIMIT = 1800;
    const int MONTH_LIMIT = 12;
    const int COUNTER = 1;
    const int ADD_DAY = 1;      
    int monthCount = 0;

    cout << "Enter year: ";
    cin >> year;
    cout << "Enter month by using number 1 - 12 only: ";
    cin >> monthNumber;
    cout << "Enter day: ";
    cin >> day;
    
    monthSubscript = monthNumber - COUNTER;
    
    if (year >= YEAR_LIMIT)
    {
        if (monthNumber > ZERO_LIMIT && monthNumber <= MONTH_LIMIT)
        {
             maxDays = daysInMonth[monthSubscript];
        }
            if (day > ZERO_LIMIT && day <= maxDays)
            {
                 while (index < monthNumber)
                 {
                      monthCount = monthCount + daysInMonth[index];
                      index = index + COUNTER;
                 }
                 if (isLeapYear( year ) && monthNumber > FEBRUARY)
                 {             
                        if (monthNumber == FEBRUARY)
                        {
                             daysInMonth[FEB_SUBSCRIPT] = daysInMonth[FEB_SUBSCRIPT] + 1;     
                             dayNumber = monthCount - daysInMonth[monthSubscript];
                             cout << month[monthSubscript] << " " << day 
                                  << ", " << year << endl;
                        }
                        else       
                        { 
                             dayNumber = monthCount - daysInMonth[monthSubscript];
                             cout << month[monthSubscript] << " " << day 
                                  << ", " << year << endl;
                        }
                 }
                 else
                 {
                      cout << day << " is not a valid number for " 
                           << month[monthSubscript] << endl;
                 }
            }
        else
        {
             cout << "There are 12 months in a year. Choose months from 1 to 12."
                  << endl;
        }
    }
    else
    {
         cout << "The year cannot be below 1800." << endl;
    }

    cout << "Enter year: ";
    cin >> year;
    cout << "Enter month by using number 1 - 12 only: ";
    cin >> monthNumber;
    cout << "Enter day: ";
    cin >> day;
    
	system("PAUSE");
	return 0;
}

bool isLeapYear( int year )
{
    bool result = false;
    result = (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0));
    return result;
}

thank you in advance

Kacyndra · #2 18-May-2005, 06:30

does it give you an error? or are you getting the wrong output?
can you post either the output or the errors here also.

Sokar · #3 18-May-2005, 07:55

Quote:

Originally Posted by dazzer143

not sure what i did wrong...

If you are not familiar with or do not have a debugger. You can debug like this.

CPP / C++ / C Code:

monthSubscript = monthNumber - COUNTER;

To check that you could do something like,

CPP / C++ / C Code:

cout << "monthNumber - COUNTER = " << monthSubscript << endl;

To check this,

CPP / C++ / C Code:

if (year >= YEAR_LIMIT)

maybe this

CPP / C++ / C Code:

cout << "year >= YEAR_LIMIT = " << boolalpha << (year >= YEAR_LIMIT) << endl;

or

CPP / C++ / C Code:

cout << year << " >= " << YEAR_LIMIT << " = " << boolalpha << (year >= YEAR_LIMIT) << endl;

This is where you might put them,

CPP / C++ / C Code:

#include <iostream>
#include <cmath>
#include <string>
#include <algorithm>
#include <cctype>

using namespace std;

bool isLeapYear( int year );

int main()
{
    string month[13] = { "---", "January", "February", "March", "April", "May",
        "June", "July", "August", "September", "October", "November",
        "December" };
    int daysInMonth[13] = { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
    int index = 0;
    int monthNumber = 0;
    int monthSubscript = 0;
    const int FEB_SUBSCRIPT = 1;
    int year = 0;
    int dayNumber = 0;
    int maxDays = 0;
    const int FEBRUARY = 2;
    int day = 0;
    const int ZERO_LIMIT = 0;
    const int YEAR_LIMIT = 1800;
    const int MONTH_LIMIT = 12;
    const int COUNTER = 1;
    const int ADD_DAY = 1;     
    int monthCount = 0;

    cout << "Enter year: ";
    cin >> year;
    cout << "Enter month by using number 1 - 12 only: ";
    cin >> monthNumber;
    cout << "Enter day: ";
    cin >> day;

    monthSubscript = monthNumber - COUNTER;
    cout << "monthNumber - COUNTER = " << monthSubscript << endl;//added
   
    cout << "year >= YEAR_LIMIT = " << boolalpha << (year >= YEAR_LIMIT) << endl;//added
    cout << year << " >= " << YEAR_LIMIT << " = " << boolalpha << (year >= YEAR_LIMIT) << endl;//added
    if (year >= YEAR_LIMIT)
    {
        cout << "monthNumber > ZERO_LIMIT && monthNumber <= MONTH_LIMIT = " << boolalpha
            << (monthNumber > ZERO_LIMIT && monthNumber <= MONTH_LIMIT) << endl;//added

        if (monthNumber > ZERO_LIMIT && monthNumber <= MONTH_LIMIT)
        {
            maxDays = daysInMonth[monthSubscript];
            cout << "maxDays = " << maxDays << endl;//added
        }
        cout << day << " > " << ZERO_LIMIT << " && " << day << " <= "
            << maxDays << " " << boolalpha << (day > ZERO_LIMIT && day <= maxDays) << endl;//added
        if (day > ZERO_LIMIT && day <= maxDays)
        {
            while (index < monthNumber)
            {
                monthCount = monthCount + daysInMonth[index];
                index = index + COUNTER;
            }
            if (isLeapYear( year ) && monthNumber > FEBRUARY)
            {            
                if (monthNumber == FEBRUARY)
                {
                    daysInMonth[FEB_SUBSCRIPT] = daysInMonth[FEB_SUBSCRIPT] + 1;    
                    dayNumber = monthCount - daysInMonth[monthSubscript];
                    cout << month[monthSubscript] << " " << day
                        << ", " << year << endl;
                }
                else      
                {
                    dayNumber = monthCount - daysInMonth[monthSubscript];
                    cout << month[monthSubscript] << " " << day
                        << ", " << year << endl;
                }
            }
            else
            {
                cout << day << " is not a valid number for "
                    << month[monthSubscript] << endl;
            }
        }
        else
        {
            cout << "There are 12 months in a year. Choose months from 1 to 12."
                << endl;
        }
    }
    else
    {
        cout << "The year cannot be below 1800." << endl;
    }

    cout << "Enter year: ";
    cin >> year;
    cout << "Enter month by using number 1 - 12 only: ";
    cin >> monthNumber;
    cout << "Enter day: ";
    cin >> day;

    system("PAUSE");
    return 0;
}

bool isLeapYear(int year)
{
    bool result = false;
    result = (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0));
    return result;
}

I did not add one everywhere but you get the idea and can add any additional ones.

dazzer143 · #4 18-May-2005, 15:46

I just got the wrong output .. but i figured it out now.. thank you guys.

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