Question

Паскаль Напишите программу (с комментариями), выселяющую площадь круга через радиус. Значение радиуса 9 ввести с клавиатуры. Результат вычисления представьте с одной цифрой после точки.

Answer 1

Решение данной задачи прикреплено ниже, как и просили, с комментариями.

Answer 2

Program to Calculate the Area of a Circle in Pascal

Here's a Pascal program that calculates the area of a circle using the radius. The program prompts the user to enter the radius value, and then it calculates and displays the area of the circle with one digit after the decimal point.

program CalculateCircleArea;
var
  radius: real;
  area: real;
begin
  // Prompt the user to enter the radius
  writeln('Enter the radius of the circle:');
  readln(radius);

// Calculate the area of the circle
  area := 3.14159 * radius * radius;

// Display the result with one digit after the decimal point
  writeln('The area of the circle is: ', area:0:1);
end.

This program uses the formula for calculating the area of a circle, which is π * radius^2, where π is approximately 3.14159. The program prompts the user to enter the radius value, reads it from the keyboard, calculates the area using the formula, and then displays the result with one digit after the decimal point.

To run this program, you can use a Pascal compiler or an integrated development environment (IDE) that supports Pascal programming. Simply copy the code into a Pascal editor, compile, and run the program. After running the program, it will prompt you to enter the radius value, and then it will display the calculated area of the circle.

Please note that the value of π used in this program is an approximation. For more accurate calculations, you can use a more precise value of π or a library function that provides a more accurate approximation of π.

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