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write a program that reads in the radius of a circle

Posted on 2001-06-05
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Last Modified: 2008-03-03
and prints the circle's diameter, circumference and area. Use the constant value 3.14159. Do each of these calculations inside the prints statements and use the conversion specifier %f.

anyone can helps me, i am a novice of C++, so please, THANKS.
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Question by:marcuskhor
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by:marcuskhor
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thanks for devx.com, it helps me a lot and thanks for those who answers my question.
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by:omkamal
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#include <iostream.h>

void main()
{
     double r;
     double area, circum, dia;
     const double pi = 3.14159;

     cout << "Enter the radius:";
     cin >> r;

     area = pi * r * r;
     dia = 2 * r;
     circum = pi * dia;

     
     cout << "\nRadius entered :" << r << "\n";
     cout << "Area :" << area << "\n";
     cout << "Diameter :" << dia << "\n";
     cout << "Circumference :" << circum << "\n";
     return;
}

You can make this code more fashionable. But since you said you are a novice this would be more simpler to start with. You can also use printf statements and specify %f inside them. But using cout, cin would be more of C++ then using printf and scanf which are C functions.

By the way, is this what you want?
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by:nietod
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We cannot do your schoolwork for you.  That is unethical and is grounds for removal from this site.  (for both you and the experts involved.)  

We can provide only limitied help in accademic assignments.    We can answer specific (direct) questions, like you might ask your teacher.  We can review your work and post suggestions, again, like your teacher might do.

Do you have specific questions?
Do you have any work on this (incomplete even) that we can review?

********************************

omkamal, don't help people cheat!
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by:omkamal
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Marcuskhor,

Nietod may be right. I am wondering why you asked such a question in the expert zone. Please do not try to waste others time. Forgive me if I really hurted you. All we say is such a question is an exercise that can be found in any beginner's c++ book or any c++ learning website. We all try to be helpful here. But not for anything in the world. Knowledge Exchange Expert Zone has got specific goals. See you back in 5 or 6 months.
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by:Talmash
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hi all .

your problem is both c++ language and mathematics .

I can offer my help by solving (try) hardest mathematical
problems .

Tal
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by:nietod
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omkamal ,
   There is nothing wrong with a beginner asking for help here.  But a student cannot ask use to do their work for them.  they can only ask for _assistance_.  Like tutoring.
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amp072397 earned 0 total points
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Hello marcuskhor, welcome to EE. If you have not done so, you should read the membership agreement at http://www.experts-exchange.com/jsp/infoMemberAgreement.jsp

I hope you understand EE's policy. If you don't learn how to code it yourself, you're not learning at all. Please do not ask specific questions again. You are allowed to ask only for guidance and direction for homework issues.

I've removed the points from this question. Experts who answer homework issues receive no points because it's really not permitted.

No one will be "removed from the site" unless this is done repetitively. Threatening statements like that will only make you feel unwelcome, and you ARE welcome here.

marcuskhor, I'd like to delete this question as soon as I know you understand.

Thanks everyone.
amp
Community Support Moderator
Experts Exchange
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by:Moondancer
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