Circumference of Circle in C++

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Q.Write a C++ program to find the area and circumference of a circle.

#include <iostream>    
using namespace std;
  
int main()
{
	float r, a, c;
	cout << "Enter the radius of circle: ";
	cin >> r;
	a =3.14 *r *r;
	cout << "Area of circle : " << a << endl;
	c=2*3.14*r;
	cout << "circumference of circle : " << c;
    return 0;    
}
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Q. Write an algorithm to find the area and circumference of a circle.

1. Start
2. Input: Prompt the user to enter the radius of the circle (`r`).
3. Process:
    - Calculate the area of the circle using the formula:
       `area (a) = π * r * r`
       (Use 3.14 for π)
   - Calculate the circumference of the circle using the formula:
        `circumference (c) = 2 * π * r`
4. Output :
   - Display the calculated area.
   - Display the calculated circumference.
5. End
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