//Kerry Cain
//Sequence Assn. Part 3
//displays the character entered as well as its ASCII value

#include <iostream>
#include <iomanip>
using namespace std;

void getDate ();
int validDate (int&, int&, int&);
int dayNumber (int&, int&, int&);
bool isLeapyear (int year);




int main()
{
    int month;
    int day;
    int year;

    cout << "\nThis program will read in a date and return the date \n";
    cout << "\nIt will also display the number the day is of that year "<< endl;
    cout << "\nThe year must be between 1 and 3000 " << endl;
    cout << "\n";

    getDate ();



    return 0;
}

void getDate ()
{
    char Y;
    char cont = Y;

    while (cont != 'N')
    {
        int month;
        int day;
        int year;
        char b;
        int daycount;
        int dayNumber;



            cout << "\nPlease enter a date in the form month/day/year: ";
            cin >> month >> b >> day >> b >> year;
            cout <<endl;
            validDate (month, day, year);
            dayNumber (month, day, year);
            cout << setw (2) << setfill ('0') << day << "-";
            switch (month)
            {
                case 1:
                     cout <<"January";
                     break;
                case 2:
                     cout <<"February";
                     break;
                case 3:
                     cout <<"March";
                     break;
                case 4:
                     cout <<"April";
                     break;
                case 5:
                     cout <<"May";
                     break;
                case 6:
                     cout <<"June";
                     break;
                case 7:
                     cout <<"July";
                     break;
                case 8:
                     cout <<"August";
                     break;
                case 9:
                     cout <<"September";
                     break;
                case 10:
                     cout <<"October";
                     break;
                case 11:
                     cout <<"November";
                     break;
                case 12:
                      cout <<"December";
                      break;
            }
            cout << "-";
            cout << setw (4) << setfill ('0') << year;
            cout << " is day number "<<day<< " in year "<<year<<endl;
            cout <<endl;
            cout << "If you wish to exit program please enter N to keep going enter Y: ";
            cin >>cont;
            cout <<endl;

    }

    return;
}

bool isLeapyear (int year)
{
    if (year % 400 == 0 || ( year % 4 == 0 && year % 100 != 0 ) )
        return true;
    else
        return false;
}

int validDate (int& month, int& day, int& year)
{
    int daysinmonth = 0;

    if (month >= 1 && month <=12)
    {

    }
    else
    {
        cout <<"Error the month is not in the valid range!!"<<endl;
    }
    if (year >=1 && year <=3000)
    {
    ;
    }
    else
    {
        cout <<"Error you have input an invalid year!! "<<endl;
    }
    if (month == 9|| month == 4 || month == 6 || month == 11)
    {
        daysinmonth = 30;
    }
    else if (month == 2)
    {
        if (isLeapyear(year))
            daysinmonth = 29;
        else
            daysinmonth = 28;
    }
    else
    {
        daysinmonth = 31;
    }
    if (day < daysinmonth)
    ;
    else
    {
    cout <<"Error you have input an invalid day number!! "<<endl;
    }

        return (daysinmonth);
}

int dayNumber (int& month, int& day, int& year)
{

    int daycount = day;

        if (month > 1)
            daycount = daycount + 31;
        if (month > 2)
        {
            if (isLeapyear (year))
                daycount = daycount + 29;
            else
                daycount = daycount + 28;
        }
        if (month > 3)
            daycount = daycount + 31;
        if (month > 4)
            daycount = daycount + 30;
        if (month > 5)
            daycount = daycount + 31;
        if (month > 6)
            daycount = daycount + 30;
        if (month > 7)
            daycount = daycount + 31;
        if (month > 8)
            daycount = daycount + 31;
        if (month > 9)
            daycount = daycount + 30;
        if (month > 10)
            daycount = daycount + 31;
        if (month > 11)
            daycount = daycount + 30;

    cout <<"daycount is now "<<daycount<<endl;

    return (daycount);
}