/* Cylinder.c: cylinder functions		*/
/* author: Rainer Doemer			*/
/* modifications:				*/
/* 10/25/05 RD initial version			*/

#include <stdio.h>

/* cylinder functions */

double pi(void)
{
    return(3.1415927);
}

double CircleArea(double r)
{
    return(pi() * r * r);
}

double CirclePerimeter(double r)
{
    return(2 * pi() * r);
}

double Surface(double r, double h)
{
    double side, lid;

    side = CirclePerimeter(r) * h;
    lid = CircleArea(r);

    return(side + 2*lid);
}

double Volume(double r, double h)
{
    return(CircleArea(r) * h);
}

/* main function */

int main(void)
{
    double r, h, s, v;

    /* input section */
    printf("Please enter the radius: ");
    scanf("%lf", &r);
    printf("Please enter the height: ");
    scanf("%lf", &h);

    /* computation section */
    s = Surface(r, h);
    v = Volume(r, h);

    /* output section */
    printf("The surface area is %f.\n", s);
    printf("The volume is %f.\n", v);

    return 0;
} /* end of main */

/* EOF */