C++ Programming Code Examples C++ > Computer Graphics Code Examples Area Of Circle Area Of Circle The area of a circle is ? (Pi) times the Radius squared, which is written A=?r2. #include <iostream> #include<conio.h> #include<stdlib.h> using namespace std; int main(){ // Declare Variables float radius, area; cout << "Simple C++ Program : Area Of Circle\n"; cout <<"\nEnter the radius of Circle : "; cin>>radius; area = 3.14 * radius * radius; cout <<"\nArea of Circle : "<<area; getch(); return (0); }