C Programlama Yarıçapı girilen dairenin çevresini ve alanını hesaplama Örnek

#include <cstdlib>
#include <iostream>
#include <conio.h>
#define PI 3.14
int main(int argc, char *argv[])
{
using namespace std;
{
float radius;
float circum, area;
cout << "Dairenin Yaricapini Giriniz= ";
cin >> radius;
circum = 2 * PI * radius;
area = PI * radius * radius;
cout << "Dairenin Cevresi= " << circum << endl;
cout << "Dairenin Alani= " << area << endl;
getch();
}
}