// pizza.c -- uses defined constants in a pizza context
#include <stdio.h>
#define PI 3.14159

int main(void)
{
	float area, circum, radius;

	printf("What is the radius of your pizza? ");
	scanf("%f", &radius);
	area = PI *  radius * radius;
	circum = 2.0 * PI * radius;
	printf("Your basic pizza parameters are as follows:\n");
	printf("circumference = %1.2f, area = %1.2f\n", circum, area);
	return 0;
}