C++ Taskbook Level 2.7
Given an array of integers:
int arr[] = {1, 2, 3, 4, 5};
Find the sum of the squares of the elements of this array.
Given an array of numbers:
int arr[] = {1, 2, 3, 4, 5};
Merge the elements of this array into a string:
"12345"
Given an array with a date:
std::string arr[] = {"2025", "12", "31"};
From the elements of this array, collect the date in the following format:
"31-12-2025"
