#include using namespace std; class Date { public: Date(int m, int d, int y):month(m),day(d),year(y) { if (checkIfLeapYear(year)) isLeapYear = true; else isLeapYear = false; setDayNum(); } ~Date(){}; int month; int day; int year; bool isLeapYear; int dayNum; bool checkIfLeapYear(int yr) { if (yr % 4 == 0) { if (yr % 100 == 0) { if (yr % 400 == 0) return true; return false; } return true; } return false; } void printDate() { cout << month << "/" << day << "/" << year << endl; } void setDayNum() { int count = 0; for (int i = 1; i366) { daysLeft -= 366; currentYear+=1; currentMonth=0; } else if (!checkIfLeapYear(currentYear) && daysLeft>365) { daysLeft -= 365; currentYear+=1; currentMonth=0; } else { break; } } // last day of every month as represented in nth day of year form // 59 should be 60 on leap year and everything after +1 int nonLeapYearmonths[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}; int leapYearMonths[13]= {0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366};; int (*months)[13] = (checkIfLeapYear(currentYear)) ? &leapYearMonths : &nonLeapYearmonths; while ((*months)[currentMonth] < daysLeft) { // Figure out the correct month. currentMonth++; } // Get the day thanks to the months array currentDay = daysLeft - (*months)[currentMonth - 1]; cout << currentMonth << "/" << currentDay << "/" << currentYear << endl; } }; int main () { Date date(4,5,2020); date.printFutureDate(200); // prints 10/22/2020 date.printFutureDate(271); // prints 1/1/2021 cout << std::boolalpha << date.isLeapYear << endl; cout << date.dayNum << endl; return 0; }

XDaysFromGivenDate