C++ Taskbook Level 5.6

Задание 1

Determine how many digits are needed to write down all the integers in the range from 1 to 100.

Задание 2

Write a program that will find the roots of a quadratic equation. To do this, ask the user for three numbers that will be the coefficients of the equation.

Задание 3

Create the following array using loops:

cppint[] {
  {1, 2, 3},
  {4, 5, 6},
  {7, 8, 9},
}

Задание 4

Two numbers are given:

cppint num1 = 12345;
int num2 = 45678;

Output to the console the numbers that are in both numbers.