//pass by reference

#include <iostream>
using namespace std;
void jumlah (int & a){
    a = a + 100;
    //2
    cout << "NIlai pada fungsi : " << a << endl;
}
int main(){
    int angka = 50;
    //1
    cout << "Nilai awal : " << angka << endl;

    jumlah(angka);

    //3
    cout << "Nilai akhir : " << angka << endl;

    return 0;
}