#include <stdio.h>

int main() 
{
	const float PI = 3.1415;

	float circumference;
	float radius_of_circle;

	float area_of_circle;
	float side_of_square;
	float perimeter_of_square;
	float area_of_square;

	printf("\n Please enter the circumference of the circle : ");
	scanf_s("%f", &circumference);

	radius_of_circle = circumference / (2 * PI);

	area_of_circle = PI * radius_of_circle * radius_of_circle;

	perimeter_of_square = circumference;

	side_of_square = perimeter_of_square / 4;

	area_of_square = side_of_square * side_of_square;

	printf("\n The area of the circle is %f", area_of_circle);

	printf("\n The area of the square is %f", area_of_square);

	getchar();
	getchar();

	return 0;
}