C++ Taskbook Level 2.3

Задание 1

Given an array of integers:

cppint arr[] = {1, 2, 3, 4, 5};

Find the sum of the squares of the elements of this array.

Задание 2

Given an array of integers:

cppint arr[] = {1, 2, 3, 4, 5};

Find the arithmetic mean of this array.

Задание 3

Given some integer:

cppint num = 12345;

Display its first three digits in the console.

Задание 4

Given an array:

cppunsigned int arr[10];

Use a loop to fill this array with integers from 1 to 10.