//Date Problem
//Ryan Hoover
#include <iostream>

using namespace std;

int GetYear();
int GetDay();
int GetMonth();
bool IsValid(int,int,int);

int main()
{
	int year, day, month;
	cout << "This program will determine whether a date is a valid date or not.\n\n";
	year = GetYear();
	day = GetDay();
	month = GetMonth();
	if (IsValid(year,day,month))
	{	cout << year << " " << day << " " << month << " is a valid date :)\n";
	}
	else
	{	cout << year << " " << day << " " << month << " is not a valid date :(\n";
	}

	int stop;
	cin >> stop;
	return 0;
}

int GetYear()
{	int year;
	do
	{	cout << "Enter a four digit year: ";
		cin >> year;
	} while (year < 1000 || year > 9999);
	cout << endl;
	return year;
}

int GetDay()
{	int day;
	do
	{	cout << "Enter a day of the month (between 1 and 31): ";
		cin >> day;
	} while (day < 1 || day > 31);
	cout << endl;
	return day;
}

int GetMonth()
{	int month;
	do
	{	cout << "Enter a month (between 1 and 12): ";
		cin >> month;
	} while (month < 1 || month > 12);
	cout << endl;
	return month;
}

bool IsVaild(int year, int day, int month)
{
	bool status = true;
	if (year % 4 == 0)
	{	status = true;
		if (month == 6 || month == 4 || month == 9 || month == 11)
		{	if (day > 31)
			{	status = false;
			}
		}
		else if (month == 2)
		{	if (day > 28)
			{	status = false;
			}
		}
	}
	else if (year % 400 == 0)
	{	status = true;
		if (month == 6 || month == 4 || month == 9 || month == 11)
		{	if (day > 30)
			{	status = false;
			}
		}
		else if (month == 2)
		{	if (day > 28)
			{	status = false;
			}
		}
	}
	else if (year % 100 != 0)
	{	status = false;
	}
	return status;
}