#include #include /* Input format: int AGE int YEAR (future) */ void errorMessage(int reason) { char *msg; switch(reason){ case 1: msg = "Invalid age."; break; case 2: msg = "Invalid year.\nThe year must be > current year"; break; }; std::cout << "Error : " << msg << std::endl; abort(); } int main() { time_t t = time(NULL); tm* timePtr = localtime(&t); int this_year = (timePtr->tm_year) + 1900; int this_month = (timePtr->tm_mon) + 1; int age, max_year, year_gap, tot_months; float tot_days, tot_hours; char *will = "will"; std::cout << "Age: "; std::cin >> age; std::cout << age << std::endl; if (age <= 0 || age >= 100) errorMessage(1); std::cout << "Year: "; std::cin >> max_year; std::cout << max_year << std::endl; if (max_year <= this_year) errorMessage(2); for (int i = this_year; i <= max_year; i++ ) { age++; } age--; year_gap = max_year - this_year; tot_months = (12 * year_gap) + (12 - this_month); tot_days = tot_months * 30.436875; tot_hours = tot_days * 24; if ((max_year - this_year) > 100) will = "would"; std::cout << "By " << max_year << " you " << will << " be " << age << " years old!" << std::endl; std::cout << "\n**************************************" << std::endl; std::cout << tot_months << " months left." << std::endl; std::cout << tot_days << " days left." << std::endl; std::cout << tot_hours << " hours left." << std::endl; std::cout << "**************************************" << std::endl; }

Future age calculator