Kasus : 3
#include <iostream>
#include <conio>
main(){
int a,b,c,d;
cout<<"Masukkan Panjang : ";
cin>>a;
cout<<"Masukkan Lebar   : ";
cin>>b;
c=a*b;
d=2*(a+b);
cout<<endl;
cout<<"============================="<<endl;
cout<<"Nilai Panjang  :"<<a<<endl;
cout<<"Nilai Lebar    :"<<b<<endl;
cout<<"Luas P x L     :"<<c<<endl;
cout<<"Nilai Keliling :"<<d<<endl;
cout<<"=============================";
getch();

}