#include #include #include #include /** * A fun birth date calculator that shows you roughly * how old you are in seconds, minutes, hours, days, * weeks, and years. * Author: Ace * Bugs: None known * * Version changes: * 0.0.0.0 - Basic structures, functionality * 0.0.0.1 - Seperated calculations and * input...program was getting large * 0.0.0.2 - Tested basic functionality -- done! * Found issues with month calculation, so it's * on hold for now. * 0.0.0.3 - Adding exception handling for input, * changed askForBirthdate's type from void to int. * return 0 = everything is fine, no problem with * inputs. * return 1 = something went wrong. Print error * statement and terminate. * 0.0.0.4 Debugging * 0.0.0.5 Debugging complete. Issue remains with * month calculation. * 0.0.0.6 - Months calculation is now more accurate */ //needed to check date bool leapYear(int year) { return ((year%4==0)&&(year%100!=0))||(year%400==0); } //checks if we have a valid date bool validDate(int day, int month, int year) { if(month < 1 || year < 1970) return false; /* * Remember the old poem: * 30 days hath September, * April, June and November; * February has 28 alone * All the rest have 31 * Except in Leap Year, that's the time * When February's Days are 29 */ switch(month) { case 1: return day > 0 && day < 31; case 2: return leapYear(year) ? day > 0 && day < 29 : day > 0 && day < 28; case 3: return day > 0 && day < 31; case 4: return day > 0 && day < 30; case 5: return day > 0 && day < 31; case 6: return day > 0 && day < 30; case 7: return day > 0 && day < 31; case 8: return day > 0 && day < 31; case 9: return day > 0 && day < 30; case 10: return day > 0 && day < 31; case 11: return day > 0 && day < 30; case 12: return day > 0 && day < 31; default: return false; } } //the UI int askForBirthdate(int &day, int &month, int &year) { //Get birthday input from user. std::cout << "Welcome to the Ace's age Calculator!\n"; std::cout << "\n\nWhat month were you born in (1-12): "; std::cin >> month; if(std::cin.fail()) { //std::cout << "\nmonth cin.fail() set.\n"; return 1; } if(std::cin.bad()) { //std::cout << "\nmonth cin.bad() set.\n"; return 1; } std::cout << "\nWhat day of the month you were born: "; std::cin >> day; if(std::cin.fail()) { //std::cout << "\nday cin.fail() set.\n"; return 1; } if(std::cin.bad()) { //std::cout << "\nday cin.bad() set.\n"; return 1; } std::cout << "\nWhat year you were born (After 1970 please): "; std::cin >> year; if(std::cin.fail()) { //std::cout << "\nyear cin.fail() set.\n"; return 1; } if(std::cin.bad()) { //std::cout << "\nyear cin.bad() set.\n"; return 1; } if(validDate(day, month, year)) std::cout << "\nOne moment.\nCalculating...\n\n"; else { //std::cout << "\nvalidDate() fail.\n"; return 1; } return 0; } //time struct for birth date time_t timeForDate(int day, int month, int year) { struct tm timeinfo = { 0 }; timeinfo.tm_mday = day; timeinfo.tm_mon = month - 1; timeinfo.tm_year = year - 1900; timeinfo.tm_isdst = -1; //is it daylight savings time? return mktime(&timeinfo); } int main() { int dayOfBirth, monthOfBirth, yearOfBirth; try{ if(askForBirthdate(dayOfBirth, monthOfBirth, yearOfBirth)) throw -1; }catch(...) { std::cerr << "\nError. Could not read proper birth date. Quitting"; return 0; } time_t birthTime = timeForDate(dayOfBirth, monthOfBirth, yearOfBirth); time_t nowTime = time(0); time_t ageInSeconds = nowTime - birthTime; std::cout << "You are " << ageInSeconds << " seconds old.\n"; std::cout << "You are " << ageInSeconds / 60 << " minutes old.\n"; std::cout << "You are " << ageInSeconds / 60 / 60 << " hours old.\n"; std::cout << "You are " << ageInSeconds / 60 / 60 / 24 << " days old.\n"; std::cout << "You are " << ageInSeconds / 60 / 60 / 24 / 7 << " weeks old.\n"; std::cout << "You are ~" << (int) (ageInSeconds / 60 / 60 / 24 / (double) 365.25 * 12) << " months old.\n"; std::cout << "You are " << ageInSeconds / 60 / 60 / 24 / 365 << " years old.\n"; return 0; }

Ace's Age Calculator