Question

Радиус окружности равен r. Напишите программу вычисления площади круга (S) и длины окружности (l). Радиус круга вводится пользователем (PI= 3,14).​

Answer 1

Программа:

Python:

pi = 3.14

r = float(input('r = '))

C = 2 * pi * r

S = pi * r**2

print(f'C = {round(C, 4)}\nS = {round(S, 4)}')

C++:

#include <iostream>

using namespace std;

int main()

{

   float r, C, S, PI = 3.14;

   cout << "r = "; cin >> r;

   C = 2 * PI * r;

   S = PI * r * r;

   cout << "C = " << C << endl << "S = " << S;

}

Answer 2

Program to Calculate the Area and Circumference of a Circle

To calculate the area (S) and circumference (l) of a circle with a given radius (r), you can use the following program:

# Prompt the user to enter the radius of the circle
radius = float(input("Enter the radius of the circle: "))

# Calculate the area of the circle
area = 3.14 * radius ** 2

# Calculate the circumference of the circle
circumference = 2 * 3.14 * radius

# Print the results
print("The area of the circle is:", area)
print("The circumference of the circle is:", circumference)

In this program, we first prompt the user to enter the radius of the circle using the `input()` function. The radius is then stored in the variable `radius`.

We then calculate the area of the circle using the formula `area = 3.14 * radius 2`, where `` represents exponentiation. The result is stored in the variable `area`.

Similarly, we calculate the circumference of the circle using the formula `circumference = 2 * 3.14 * radius`. The result is stored in the variable `circumference`.

Finally, we use the `print()` function to display the calculated area and circumference of the circle.

Please note that the value of pi (π) is approximated as 3.14 in this program. If you need a more accurate value, you can use the `math.pi` constant from the `math` module in Python.

I hope this helps! Let me know if you have any further questions.