#include #include class DateFinder { int DD, MM, YYYY, NYYYY, NMM, IDAY, day, flag; public: DateFinder() :DD(32), MM(13), YYYY(-1), NYYYY(0), NMM(0), IDAY(0),day(0),flag(0) { std::string month[] = { "January","February","March","April","May","June","July", "August","September","October","November","December" }; std::cout << "Enter your date of birth[DD MM YYYY]: "; std::cin >> DD >> MM >> YYYY; InvalidInputs(DD, MM, YYYY); DateValidation(DD, MM, YYYY); UserMonthInput(MM, YYYY, DD); ConditionalMonth(MM, NYYYY, YYYY, NMM); CalculateDay(IDAY, day, DD, YYYY, MM, NMM, NYYYY); CalculateDayOfWeek(day); FlagDetermination(DD, flag); OutputResults(month, MM, YYYY); } int InvalidInputs(int&, int&, int&); int DateValidation(int&, int&, int&); int UserMonthInput(int&, int&, int&); int ConditionalMonth(int&, int&, int&, int&); int CalculateDay(int&, int&, int&, int&, int&, int&, int&); int CalculateDayOfWeek(int&); int FlagDetermination(int&, int&); void OutputResults(std::string[], int&, int&); }; int main(int argc, char* argv[]) { DateFinder date; return 0; } int DateFinder::CalculateDayOfWeek(int& day) { switch (day) { case 0: std::cout << " You were born on Saturday, "; break; case 1: std::cout << " You were born on Sunday, "; break; case 2: std::cout << " You were born on Monday, "; break; case 3: std::cout << " You were born on Tuesday, "; break; case 4: std::cout << " You were born on Wednesday, "; break; case 5: std::cout << " You were born on Thursday, "; break; case 6: std::cout << " You were born on Friday, "; break; } return day; } int DateFinder::FlagDetermination(int& DD, int& flag) { if (DD != 11 && DD != 12 && DD != 13) flag = DD % 10; if (flag == 1) { std::cout << DD << "st of "; } else if (flag == 2) { std::cout << DD << "nd of "; } else if (flag == 3) { std::cout << DD << "rd of "; } else { std::cout << DD << "th of "; } return DD; } void DateFinder::OutputResults(std::string month[],int& MM, int& YYYY) { std::cout << month[MM - 1] << " of " << YYYY << "!" << '\n'; } int DateFinder::CalculateDay(int& IDAY, int& day, int& DD, int& YYYY, int& MM, int& NMM, int& NYYYY) { IDAY = 365 * YYYY + DD + 31 * (MM - 1) - NMM + (NYYYY / 4) - ((3 * ((NYYYY / 100) + 1) / 4)); day = IDAY % 7; return day; } int DateFinder::ConditionalMonth(int& MM, int& NYYYY, int& YYYY, int& NMM) { if (MM <= 2) { NYYYY = YYYY - 1; NMM = 0; } else { NYYYY = YYYY; NMM = (4 * MM + 23) / 10; } return NMM; } int DateFinder::UserMonthInput(int& MM, int& YYYY, int& DD) { switch (MM) { case 2: if ((YYYY % 400) == 0 || ((YYYY % 4) == 0 && (YYYY % 100) != 0)) { //Error Message: User has requested an invalid day for the month "February" // and the requested "Year" is a leap year. if (DD > 29) { std::cout << " The year " << YYYY << " is a leap year. " << '\n'; std::cout << " So, February has up to 29 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } } else { //Error Message: User has requested an invalid day for the month "February" // and the requested "Year" is not a leap year. if (DD > 28) { std::cout << " The year " << YYYY << " isn't a leap year. " << '\n'; std::cout << " So, February has up to 28 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } } break; case 4: //Error Message: User has requested an invalid day for the month "April" if (DD > 30) { std::cout << " April has up to 30 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } break; case 6: //Error Message: User has requested an invalid day for the month "June" if (DD > 30) { std::cout << " June has up to 30 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } break; case 9: //Error Message: User has requested an invalid day for the month "September" if (DD > 30) { std::cout << " September has up to 30 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } break; case 11: //Error Message: User has requested an invalid day for the month "November" if (DD > 30) { std::cout << " November has up to 30 days. " << '\n'; std::cout << " Try again! " << '\n'; return -1; } break; } return MM; } int DateFinder::DateValidation(int& DD, int& MM, int& YYYY) { if (DD > 31 || MM > 12 || YYYY <= 0) { if (DD > 31 && MM > 12) { //Error Message: User has given invalid input for "Days", "Months" & "Years" fields if (YYYY <= 0) { std::cout << " We have 12 months, the days of a month are up to 31 " << '\n'; std::cout << " and a year should be a positive number. " << '\n'; } //Error Message: User has given invalid input for "Days" & "Months" fields else { std::cout << " We have 12 months and " << '\n'; std::cout << " the days of a month are up to 31. " << '\n'; } } else if (DD > 31 && MM <= 12) { //Error Message: User has given invalid input for "Days" & "Years" fields if (YYYY <= 0) { std::cout << " The days of a month are up to 31 and " << '\n'; std::cout << " a year should be a positive number. " << '\n'; } //Error Message: User has given invalid input for "Days" field else { std::cout << " The days of a month are up to 31. " << '\n'; } } else if (DD <= 31 && MM > 12) { //Error Message: User has given invalid input for "Months" & "Years" fields if (YYYY <= 0) { std::cout << " We have 12 months and " << '\n'; std::cout << " a year should be a positive number. " << '\n'; } //Error Message: User has given invalid input for "Months" field else { std::cout << " We have 12 months. " << '\n'; } } //Error Message: User has given invalid input for "Years" field else if (DD <= 31 && MM <= 12 && YYYY <= 0) { std::cout << " A year should be a positive number. " << '\n'; } return -1; } return DD, MM, YYYY; } int DateFinder::InvalidInputs(int& DD, int& MM, int& YYYY) { //Error Message: User has given no input if (DD == 32 && MM == 13 && YYYY == -1) { std::cout << " Format failure[DD MM YYYY] " << '\n'; return -1; } if (DD <= 0) { //Error Message: User has given invalid input for "Days" & "Months" fields if (MM <= 0) { std::cout << " Invalid entry[Negative or Null [Days-Months]] " << '\n'; return -1; } //Error Message: User has given invalid input for "Days" field std::cout << " Invalid entry[Negative or Null[Days]] " << '\n'; return -1; } if (MM <= 0) { //Error Message: User has given invalid input for "Months" field std::cout << " Invalid entry[Negative or Null [Months]] " << '\n'; return -1; } return DD, MM, YYYY; }

Find the Day of the Week you were born[MODIFIED for effciency]