Task$1$:

Write a recursive function, vowelsCount that returns the number of vowels in a string. Let$$s assume that $$y$$ is not a vowel.

Task$2$:

Write a recursive function, reverseDigits that takes an integer as a parameter and returns the number with the digits reversed.

Write a tester for both functions.

Option$1$: make simple calls in main function

Option$2$: have multiple input in a file process it and store the output in another file.

Option$3$: have a vector of numbers$/$words to process send the output to another vector$/$list$/$set$/[$pairs$]...$