How does recursive function works?

Question

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Answer 1

It's a function which calls itself. You should declare a base case (termination condition - condition which stops the recursion). It's explained in C++ course: https://www.sololearn.com/learn/CPlusPlus/1641/.

Answer 2

You have to ensure that the base case will always be reached. Otherwise you will get infinite recursion.

Answer 3

This is the program I wrote. I'm a beginner, so I'm not sure it's all correct.
https://code.sololearn.com/c4bzn4ZfKmt5/#c