#include <iostream>
using namespace std;
// nama : yoga dwi kurniawan
// nim : 3420230019
int main() {
const float phi = 3.14;
float jari_jari, luas, keliling;
cout << "Program Menghitung Lingkaran" << endl;
cout << "==================================================================" << endl;
cout << "Nama : Yoga Dwi Kurniawan" << endl;
cout << "HP : 08118489897" << endl;
cout << "==================================================================" << endl;
// Menampilkan nilai phi
cout << "Nilai phi adalah " << phi << endl;
cout << "Masukkan nilai jari-jari lingkaran: " << endl;
cin>>jari_jari ;
cout << "==================================================================" << endl;
luas = phi * jari_jari * jari_jari;
keliling = 2 * phi * jari_jari;
cout << "\nNilai jari-jari yang dimasukkan adalah " << jari_jari << endl;
cout << "Luas lingkaran adalah " << luas << " dan keliling lingkaran adalah " << keliling << endl;
cout << "==================================================================" << endl;
return 0;
}
