C++ Taskbook Level 10.2

Given two numbers, display the process of finding the GCD, as in school.

Two numbers are divided by each other, the result is a periodic fraction. Write a code that will determine the period of this fraction.

Ask the user for an integer. In response, output the factorization of that number.

Ask the user for two integers. In response, output an array of all prime numbers in the range specified by the values ​​entered.