Please I need help with this c programming question "which day" Can anyone make it in a simpler form with leap year functions??

Question

Given a date, please design a function to compute which day belongs to the given year.

Input

It is allowed input multiple testing data, however, you have to input the number of testing data first. The date format is given by YYYY/MM/DD, MM and DD are valid with 1 or 2 digits. We
assume that all inputs are legal.
https://code.sololearn.com/cbO5h5s5J0pX/?ref=ap

Answer 1

Thanks a lot Martin Taylor .I really appreciate