Programming Forums - Why am I not getting the correct output?

Intructions:

The program asks for the user to input the radius and height of a right
cylinder. It then calculates surface area and volume of this cylinder
and prints the out-put on the screen in the FORMAT GIVEN BELOW. The
main program calls following three functions to accomplish the above job.
calc_area (double rad, double height)
calc_volume (double rad, double height)
and
print_info (void)

II. Helpful Math Hints:
Surface area = 2*PI*r*h + PI*r*r; and volume = PI * r*r*h

III. Helpful Programming Hints:

1. Preprocessor define PI= 3.14159
2. Declare PROTOTYPE FUNCTIONS shown above with proper return
parameters.
3. Define the three programs mentioned above, in region out-side your
main program.
3. Declare variables r, d, h, V, A as “double”.
4. Ask user to enter r in centimeters, read the value and assign to r;
ask to enter h in cms, read the value (scan in lf format) and assign
to h.
5. Call the three programs, assigning their return values
appropriately.
6. Using the results print the out-put.

IV: Output to the screen in the format:
__________________________________________________ ________________________

Enter diameter in centimeters: 3
Enter height in centimeters: 5

A right circular cylinder with a diameter = 3.00 cm and a height = 5.00
cm
will have a volume and surface area

VOLUME SURFACE AREA
------------------------------------------------------

35.3429 cu_cm 61.2610 sq_cm
Press any key to continue

That is what I'm supposed to get...

Here is my updated code:

#include <stdio.h>

#include <math.h>



int main()

{

        printf("My Name ID SA33\n");

        printf("Class Number Spring 08\n");

        printf("Homework 1 Jan 30, 2008\n\n\n");



        double a,v,r;

        double d;

        double h;

        double PI;

        PI=3.14159;

        

        printf("Enter diameter in centimeters: ");

        scanf("%lf",&h);

        printf("Enter height in centimers: ");

        scanf("%lf",&d);

        r= 0.5*d;

        a= 2*PI*r*h + PI*r*r;

        v= PI*r*r*h;

        printf("With a diameter of %lf cm and a height of %lf cm\n",d,h);

        printf("The volume will be %lf cu_cm and the surface area will be %lf sq_cm\n\n",v,a)

        ;



        return 0;

}

Here is the output I got:

My Name ID SA33
Class Number Spring 08
Homework 1 Jan 30, 2008

Enter diameter in centimeters: 3
Enter height in centimers: 5
With a diameter of 5.000000 cm and a height of 3.000000 cm
The volume will be 58.904812 cu_cm and the surface area will be 66.758788 sq_cm

Press any key to continue . . .

So why am I not getting the correct output here? I can't figure out where my problem is.