/* Program Name: Date Validation Function: This program determines if a date entered by the user is valid. Input: Interactive Output: Valid date is printed or user is alerted that an invalid date was entered */ #include using namespace std; //Get the year from the user int getYear() { int year; cout << "Please enter the current year:" << endl; cin >> year; return year; } //Get the month from the user int getMonth() { int month; cout << "Please enter the current month:" << endl; cin >> month; return month; } // Get the day from the user int getDay() { int day; cout << "Please enter the current day:" << endl; cin >> day; return day; } // Checl the day, month, and year for valid values and return a true or false value bool checkDate(int year, int month, int day) { const int MIN_YEAR = 0, MIN_MONTH = 1, MAX_MONTH = 12, MIN_DAY = 1, MAX_DAY = 31; bool validDate = true; if(year <= MIN_YEAR) { validDate = false; } else if (month < MIN_MONTH || month > MAX_MONTH) { validDate = false; } else if (day < MIN_DAY || day > MAX_DAY) { validDate = false; } return validDate; } // Let the user know whether the date is valid or invalid in the terminal void messageUser(int year, int month, int day, bool validDate) { if(validDate == true) { cout << month << "/" << day << "/" << year << " is a valid date"; } else { cout << month << "/" << day << "/" << year << " is an invalid date"; } } // Start, run, and end program int main() { int year = getYear(); int month = getMonth(); int day = getDay(); bool validDate = checkDate(year, month, day); messageUser(year, month, day, validDate); return 0; }

Date Validation Program