C++ Exercises: Find the area and circumference of a circle

C++ Basic: Exercise-19 with Solution

Write a program in C++ to find the area and circumference of a circle.

Pictorial Presentation:

Sample Solution:

C++ Code :

#include <iostream>
#define PI 3.14159
using namespace std;

    int main()
    {
    	float radius, area, circum;
		cout << "\n\n Find the area and circumference of any circle :\n";
		cout << "----------------------------------------------------\n";		
        cout<<" Input the radius(1/2 of diameter) of a circle : ";
    	cin>>radius;
	
		circum = 2*PI*radius;
		area = PI*(radius*radius);
        cout<<" The area of the circle is : "<< area << endl;
        cout<<" The circumference of the circle is : "<< circum << endl;		
		
        cout << endl;
        return 0;
    }

Sample Output:

 Find the area and circumference of any circle :                       
----------------------------------------------------                   
 Input the radius(1/2 of diameter) of a circle : 5                     
 The area of the circle is : 78.5397                                   
 The circumference of the circle is : 31.4159 

Flowchart:

C++ Code Editor:

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