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

const int date_length[] = {
	 0,   //dummy element so that January will have subscript 1
	31,   //January
	28,   //February, ignoring for now the possibility of leap year
	31,   //March
	30,   //April
	31,   //May
	30,   //June
	31,   //July
	31,   //August
	30,   //September
	31,   //October
	30,   //November
	31    //December
};

void date_next(int *pyear, int *pmonth, int *pday, int count);
void date_next(int *pyear, int *pmonth, int *pday);
void date_print(const int *pyear, const int *pmonth, const int *pday);

int main()
{
	int year = 2014;
	int month = 1;   //1 to 12 inclusive
	int day = 1;     //1 to date_length[month] inclusive

	cout << "How many days forward from ";
	date_print(&year, &month, &day);
	cout << " do you want to go? ";

	int count;       //uninitialized variable
	cin >> count;

	date_next(&year, &month, &day, count);
	cout << "The new date is ";
	date_print(&year, &month, &day);
	cout << ".\n";
	return EXIT_SUCCESS;
}

void date_next(int *pyear, int *pmonth, int *pday, int count)
{
	//Call the three-argument date_next (line 55) count times.
	//Pass along the three pointers we received.

	while (--count >= 0) {
		date_next(pyear, pmonth, pday);
	}
}

void date_next(int *pyear, int *pmonth, int *pday)
{
	//Move to the next date.
	if (++*pday > date_length[*pmonth]) {
		*pday = 1;
		if (++*pmonth > 12) {
			*pmonth = 1;
			++*pyear;
		}
	}
}

void date_print(const int *pyear, const int *pmonth, const int *pday)
{
	cout << *pmonth << "/" << *pday << "/" << *pyear;
}