1) Write a program to calculate area of circle using constants

Anonymous School

            (Minds of Hacker)

--------------------------------

Write a program to calculate area of circle using constants.

#include<iostream>

using namespace std;

const float pi=3.14159265;

int main()

{

    float radius;

    cout<<"Enter the radius of circle\n ";

    cin>>radius;

    radius=pi*(radius*radius);

    cout<<"\n\nArea of circle = "<<radius;

}

Output:

Enter the radius of circle 60 Area of circle = 11309.7

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