Rust Taskbook Level 9.6

Задание 1

Given some URL:

rustlet url: &str = "http://test.com/dir1/dir2/dir3/page.html";

Get the name of the first folder:

rust"dir1"

Задание 2

Make a function that takes a number and returns that number in words. Let the function work with numbers up to 999. See the example:

rustfunc(123); // will bring out 'one hundred twenty three'

Задание 3

Given a string containing two numbers and a mathematical operation between them:

rust'10 + 20'

Write code that will calculate the result of the written mathematical operation.