prijemni.rb

### 1. Create user class by implementing
### a. properties
### i. user_id
### ii. username
### iii. password
### iv. email
### b. methods
### i. greet (learn user to say "Hi! My name is <name>, nice to meet you."
###

### 2. Create recursive function that returns result for x^y

### 3. Write a program that prints the numbers from 1 to 100. But for multiples of three
### print “Fizz” instead of the number and for the multiples of five print “Buzz”. For
### numbers which are multiples of both three and five print “FizzBuzz”.

### 4. Find the largest integer value in array (all values in array are integers)