Programming Forums > Application Development > C

WalterSlopeboi · Jan 30th, 2008, 12:59 AM

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:

(Toggle Plain Text)

#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.

Sane · Jan 30th, 2008, 1:03 AM

Please use your old thread, which had the same assignment posted, to ask further questions next time.

(Toggle Plain Text)

	printf("Enter diameter in centimeters: ");
	scanf("%lf",&h);
	printf("Enter height in centimers: ");
	scanf("%lf",&d);

You have &h and &d in the wrong places.

WalterSlopeboi · Jan 30th, 2008, 3:21 PM

Sorry for posting a new topic, but I wrote a whole new program so that's why I switched topics.

That was my problem btw. Thank you for the help.

Jan 30th, 2008, 12:59 AM	#1
WalterSlopeboi Newbie Join Date: Jan 2008 Posts: 9 Rep Power: 0	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 = 2PIrh + PIrr; and volume = PI rrh 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: (Toggle Plain Text) #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= 0.5d; a= 2PIrh + PIrr; v= PIrrh; 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; } #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= 0.5d; a= 2PIrh + PIrr; v= PIrrh; 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.

Jan 30th, 2008, 1:03 AM	#2
Sane Programming Guru Join Date: Apr 2005 Location: Waterloo, Ontario Posts: 1,888 Rep Power: 5	Re: Why am I not getting the correct output? Please use your old thread, which had the same assignment posted, to ask further questions next time. (Toggle Plain Text) printf("Enter diameter in centimeters: "); scanf("%lf",&h); printf("Enter height in centimers: "); scanf("%lf",&d); printf("Enter diameter in centimeters: "); scanf("%lf",&h); printf("Enter height in centimers: "); scanf("%lf",&d); You have `&h` and `&d` in the wrong places.

Jan 30th, 2008, 3:21 PM	#3
WalterSlopeboi Newbie Join Date: Jan 2008 Posts: 9 Rep Power: 0	Re: Why am I not getting the correct output? Sorry for posting a new topic, but I wrote a whole new program so that's why I switched topics. That was my problem btw. Thank you for the help.

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Programming Forums > Application Development > C

Why am I not getting the correct output?