Write a C++ program to calculate the diameter, circumference and are of circle.
Program will take the radius from the user as input. Print all results.
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Calculate the area of circle by C++ program.
hi,
It is a very simple program and you should be able to solve it even if i provide you the algorithm. however as you have put the question,here is your required answer:
in order to find get the radius from the user first ,you need to declare the variable :
double radius;
cin>> radius;
now you need to declare the rest of variables.
double PI = 3.14159;
double diametre;
double area;
double circumference;
in order to calculate the diametre:
diametre=radius+radius;
in order to calculate the area:
area = PI * (radius * radius);
in order to calculate the circumference:
circumference = PI * (radius +radius)
cout<<radius<<diametre<<area<<circumference;
Janet//
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Calculate the area of circle by C++ program.
Following is the code for the program to calculate diameter , circumference , and area of circle. The different steps of the program are explained with the comments ahead of the respective statement. The program can be best run on Turbo C , Visual Studio 2005 , 2008 , 2010 .
#include<iostream>
usingnamespacestd;
intmain()
{
doubler;
     doubledia, cir , area =0.0;  // declare and initialize variables
     doublepi = 3.141592654;
     cout<<"Enter radius of Circle: ";
     cin>> r;                      // Take radius as input from user
    dia = 2*r;                   // Calculate diameter
     cir = 2*pi*r;                // Calculate circumference
     area = pi*r*r;               // Calculate area
   // Print results on screen
     cout<<"Diameter is: "<< dia<<endl;
     cout<<"Cirumference is: "<<cir<<endl;
     cout<<"Area is: "<<area<<endl;
     return0;
}
In order to see the output of program check attachment
Regards
Faisal Rehman
