tugas 4.1

#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;
}