14.1

#include <iostream>
using namespace std;
void garis(){
    puts("=====================================================");
}
struct{
    string nama;
    string email;
}author;
class bujursangkar{
    private:
    // variable panjang
    int panjang,lebar;
    public:
    // prototipe function
    void set_nilai(int x,int y);
    int luas();
};
void bujursangkar ::set_nilai(int x,int y){
    panjang = x;
    lebar =y;
}
int bujursangkar::luas(){
    return panjang * lebar;
}
void cetak_author(string nama,string email){
    garis();
    cout<<"Nama :"<<nama<<endl;
    cout<<"Email :"<<email<<endl;
}
int main() {
// set nilai struct
author.nama="Zacky Ahmad";
author.email ="[email protected]";
int p1,p2,l1,l2;
// create object
bujursangkar bs1;
bujursangkar bs2;
cout<<"Bujur Sangkar 1"<<endl;
garis();
cout<<"Panjang\t: <input>";cin>>p1;cout<<endl;
cout<<"Lebar\t: <input>";cin>>l1;cout<<endl;
bs1.set_nilai(p1,l1);
cout<<"Luas\t: "<<bs1.luas();
cout<<endl<<endl;
cout<<"Bujur Sangkar 2"<<endl;
garis();
cout<<"Panjang\t: <input>";cin>>p2;cout<<endl;
cout<<"lebar\t: <input>";cin>>l2;cout<<endl;
bs2.set_nilai(p2,l2);
cout<<"Luas\t: "<<bs2.luas();
cout<<endl<<endl;
cetak_author(author.nama,author.email);
    return 0;
}