Even-After -odd

#1

Can you send an easy to understand code for this problem

#2

Reference Code: https://ide.codingblocks.com/s/573212
Explanation : Video

i hope this help
if you have any doubt feel free to ask

#3

There is program of hello world in the reference code, nothing is mentioned releated to the question.

#4

sorry the code is not saved

new link of code: