How to print Roman number of any inputted number in digit?

Question

Suppose I inputted 4 and I want IV as output.

Answer 1

Take at look at the codes in the comments of this lesson.
https://www.sololearn.com/learn/6415/

Answer 2

There must be some ASCII code I think.

Answer 3

I know that but to execute till 100 or more is a big challenge.It increases the complexity of program too.

Answer 4

How to sort the word in a sentence based on first alphabet of word?