Solved

Programs that read in the radius of a circle and prints the circle diameter....

Posted on 2006-06-24
10
581 Views
Last Modified: 2010-04-01
Hai there...i need to write a program that reads in the radius of a circle and prints the circle diameter,circumference and area. The constant value is 3.14159 for pie. For example if the user enter 5, then it will shows the result of

Diameter=10
Circumference=31.4159
Area=78.5397

Formula for the circumference and area of circle are C= 2 pie radius and A=pie radius^2
0
Comment
Question by:inzhagi
  • 4
10 Comments
 
LVL 9

Accepted Solution

by:
DrAske earned 50 total points
ID: 16976629
Okay ..i won't give a full code ..
but as i see in your description all you have to do is put what you descriped in small program ..
so first implement the *main* (inside it ask the user to enter the radius of a circle, then save it in a variable say; *Radius* of type double,integer, or float .. )
then add statements specific for each operation (circle diameter, circumeference, and area) ..
not that hard!!
Diameter is calculated by multiply the value by 2 ..
then declare a variable say; *Diatmeter* and assign to it the result of multipling the input value by two ..
then use *cout* function to show the result ..
and do so with others; declare variable and assign to it the result of the mathmatical process .. etc

e.g:

double Radius = 5;
double Area = pie*pow(Radius,2);
cout<<"The Area is : "<<Area<<endl;
 
regards, ahmad;
0
 

Author Comment

by:inzhagi
ID: 16977490
#include <iostream.h>
main()
{
      
      const double pie = 3.14159;
      double  r;
      double  D;
      double  C;
      double  A;

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

      D = 2*r;
      C = 2*pie*r;
      A = pie*r*r;

      cout <<"Diameter:"<<D<<"D"<<endl;
      cout <<"Circumference:"<<C<<"C"<<endl;
      cout <<"Area:"<<A<<"A"<<endl;

      return 0;

}

i get an error
0
 
LVL 9

Expert Comment

by:DrAske
ID: 16978576
what kind of error ??
i ran the code and it give me the expected result !!!
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 25

Assisted Solution

by:InteractiveMind
InteractiveMind earned 50 total points
ID: 16978733
#include <iostream>
using namespace std;

int main()
{
     
     const double pie = 3.14159;
     double  r;
     double  D;
     double  C;
     double  A;

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

     D = 2*r;
     C = 2*pie*r;
     A = pie*r*r;

     cout <<"Diameter:"<<D<<"D"<<endl;
     cout <<"Circumference:"<<C<<"C"<<endl;
     cout <<"Area:"<<A<<"A"<<endl;

     return 0;

}
0
 
LVL 9

Expert Comment

by:DrAske
ID: 17231143
Venabili ..

I tried to help him to accomplish his homework , and I think the asker respond to my comment and gave a full code for the solution .(I guess he followed the steps I provided in my first comment to write the code),BUT I think he solved the error after posting his code -THAT WHY HE DID NOT POST THE ERROR-.

regards, Ahmad;
0
 
LVL 9

Expert Comment

by:DrAske
ID: 17258714
Well, Venabili ..
are you going to refund or accept an answer??
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
why "." vs "->" 23 119
Would like to move button in a function 3 73
Unresolved External Symbols 3 68
C++ mouse_event mouse look 7 70
Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
The viewer will learn how to pass data into a function in C++. This is one step further in using functions. Instead of only printing text onto the console, the function will be able to perform calculations with argumentents given by the user.
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now