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An age calculator determines the exact elapsed time from a birth date to today (or any target date), accounting for varying month lengths and leap years.

단계별 가이드

1. 1Subtract birth year from current year to get base age
2. 2If birthday has not yet passed this year, subtract 1 from the result
3. 3For exact days: count days elapsed since last birthday
4. 4Leap years (Feb 29 birthdays) are counted as Feb 28 in non-leap years

풀어진 예시