Introduction
I have used CodeBlocks compiler for debugging purpose. But you can use any C++ programming language compiler as per your availability.
Write C++ program to find diameter, circumference and area of circle using function
#include <iostream>
#include <math.h>
using namespace std;
//All Function declaration
double getDiameter(double radius);
double getCircumference(double radius);
double getArea(double radius);
int main()
{
float radius, diameter, circle, area;
// Inputting radius of circle from user
cout<<"Enter radius of circle: ";
cin>>radius;
diameter = getDiameter(radius); // Calling getDiameter function
circle = getCircumference(radius); // Calling getCircumference function
area = getArea(radius); // Calling getArea function
cout<<"Diameter of the circle: "<<diameter <<" units"<<endl;
cout<<"Circumference of the circle: "<< circle<<" units"<<endl;
cout<<"Area of the circle:"<< area<<" sq. units"<<endl;
return 0;
}
// Calculating diameter of circle whose radius is given
double getDiameter(double radius)
{
return (2 * radius);
}
//Calculating circumference of circle whose radius is given
double getCircumference(double radius)
{
return (2 * M_PI * radius); // PI = 3.14
}
//Finding area of circle whose radius is given
double getArea(double radius)
{
return (M_PI * radius * radius); // PI = 3.14
}
Result
