// Edited in response to a question: // https://www.sololearn.com/Discuss/2175658/?ref=app #include // Leap year check int is_leap_year(int year) { if(year < 1) return 0; // invalid return ((!(year % 4) && (year % 100)) || !(year % 400)); } // Days in month int days_in_month(int year, int mon) { static const int DIM [] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; if(year < 1 || (mon < 1 || mon > 12)) return 0; // invalid year and/or month if(mon == 2 && is_leap_year(year)) return 29; // Feb on leap year 29 days return DIM[mon - 1]; } // Validate date parts int is_valid_date(int year, int mon, int day) { if(year < 1 || (mon < 1 || mon > 12)) return 0; // invalid year and/or month if(day < 1 || day > days_in_month(year, mon)) return 0; // invalid day return 1; } // Month name string const char* month_name(int mon) { static const char* MN[] = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"}; if(mon < 1 || mon > 12) return NULL; return MN[mon - 1]; } // Number suffix - 1st, 2nd, 3rd, 4th ... const char* suffix(int n) { static const char* NS[4] = {"th", "st", "nd", "rd"}; if(!n) return NS[0]; if(n < 0) n = -n; int v = (n < 9) ? n : n % 10; if((v && v < 4) && (n < 4 || n > 20)) return NS[v]; return NS[0]; } // Birth stone const char* birth_stone(int mon) { static const char* BIRTHSTONES[] = {"UNKNOWN", "GARNET", "AMETHYST", "AQUAMARINE", "DIAMOND", "EMERALD", "ALEXANDRITE", "RUBY", "PERIDOT", "SAPPHIRE", "OPAL", "TOPAZ", "ZIRCON"}; if(mon < 1 || mon > 12) return BIRTHSTONES[0]; return BIRTHSTONES[mon]; } // Chinese zodiac const char* chinese_zodiac(int year) { static const char* CZODIACS[] = {"UNKNOWN", "MONKEY", "ROOSTER", "DOG", "PIG", "RAT", "OX", "TIGER", "RABBIT", "DRAGON", "SNAKE", "HORSE", "GOAT"}; if(year <= 0) return CZODIACS[0]; int n = year % 12; if(n < 0 || n > 11) return CZODIACS[0]; return CZODIACS[1 + n]; } const char* zodiac(int date, int mon) { static const char* ZODIACS[] = {"UNKNOWN", "AQUARIUS", "PISCES", "ARIES", "TAURUS", "GEMINI", "CANCER", "LEO", "VIRGO", "LIBRA", "SCORPIO", "SAGITTARIUS", "CAPRICORN"}; static const int DOBS[][4] = { {20, 1, 18, 2}, // range for Aquarius {19, 2, 20, 3}, // range for Pisces {21, 3, 19, 4}, // range for Aries {20, 4, 20, 5}, // range for Taurus {21, 5, 20, 6}, // range for Gemini {21, 6, 22, 7}, // range for Cancer {23, 7, 22, 8}, // range for Leo {23, 8, 22, 9}, // range for Virgo {23, 9, 22, 10}, // range for Libra {23, 10, 21, 11}, // range for Scorpio {22, 11, 21, 12}, // range for Sagittarius {22, 12, 19, 1} // range for Capricorn }; for(size_t i = 0; i < 12; i++) { if((date >= DOBS[i][0] && mon == DOBS[i][1]) || (date <= DOBS[i][2] && mon == DOBS[i][3])) { return ZODIACS[i + 1]; } } return ZODIACS[0]; } int main() { while(1) { char str_date[12] = {0}; int date = 0, mon = 0, year = 0; printf("Enter date of birth (dd-mm-yyyyy): "); fflush(stdout); if(1 != scanf(" %11s", str_date)) break; int good = sscanf(str_date, "%d%*c%d%*c%d", &date, &mon, &year); if(3 != good || !is_valid_date(year, mon, date)) { puts("\nBad input or invalid date format!\n"); continue; } printf("\n%s %d%s, %d", month_name(mon), date, suffix(date), year); if(is_leap_year(year)) printf(" (Leap Year)"); printf("\nYou are a %s\n", zodiac(date, mon)); printf("Your birthstone is %s\n", birth_stone(mon)); printf("Your Chinese zodiac is %s\n\n", chinese_zodiac(year)); } return 0; }

QA-2175658-Chinese zodiac