Parsing date string to int using cpp

I was trying to solve a problem. The Problem is : There is given a date string like 21/9/2013. I have to convert this date into int. I have used stoi but it is just showed first two int 21.

https://stackoverflow.com/questions/67223875/parsing-date-string-to-int-using-cpp April 23, 2021 at 12:06PM