/* Name: Andrew Charles Breiner
 * Homework 1
 * Section 2.3, Page 54, Program 3
 * Asks user to input radius and computes area of circle.
 */

#include <stdio.h> /* printf, scanf definitions */
#define PI 3.14159 /* constant for PI */

int main(void) {
    double area, radius; /* declares as type double */

    /* Ask user for the radius */
    printf("Please enter the value of the radius: ");
    scanf("%lf", &radius);

    /* Compute the area of the circle */
    area = PI * radius * radius;

    /* Output the area of the circle */
    printf("The area of your circle is %f inches.\n", area);
    return 0;
} //main