Print the date in different format

Question

Input a date and print it in the following format for example -
Input-12 5 2014
Output - 12th,May,2014
Bonus : check if the other user entered a valid date beforehand
For example :
12 5 2015(valid)
30 2 2013(invalid)
28 2 2017(valid)
29 2 2012(valid)
29 2 2013(invalid)
21 35 2015(invalid)
0 2 2014(invalid)

Answer 1

Hmm, I see this needs some work with ifs and elses

Answer 2

Here you go. Checks for valid date input. Accounts for leap years.
https://code.sololearn.com/cGhUEwvBgHL7/?ref=app

Answer 3

Hint: use arrays (one use would be storing max number of days in each month in array )