How old am I?

(1) Algorithm of age on the calendar: Your age is the current year minus the year of your birth.

(2) Ming algorithm: subtract the year of birth from the current year and compare the month and date. For example, a person born on March 20th of 1980 wants to calculate the age on March 23rd of 20 13, and this method is usually adopted. First, people will subtract 1980 from 20 13 to get the age of 33, and then see if he is full, that is, whether the month and date of birth are earlier or later than today. If the date of birth is later than today, it means that he is not full, then his age should be 20 13- 1980-. If the date of birth is earlier than today or today, it means that he has turned 33 or just turned 33, then his age is 20 13- 1980=33. Nominal age plus 1 will do.

(3) Your age: The algorithm on the calendar is 20 13- 1984=29 (years old). Subtle algorithm: you are 28 years old and 29 years old; After September, you will be 29 and 30.

(4) So 28 or 29 years old is right, but 30 years old must be wrong. Please adopt it. I'll type it word for word, hoping it will help you.