Program C++

#include <iostream>

using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */
int main(int argc, char** argv) {
int r1, r2, r3, rs, rp, pilih;
cout<<"Masukkan R1 : ";cin>>r1;
cout<<"Masukkan R2 : ";cin>>r2;
cout<<"Masukkan R3 : ";cin>>r3;
rs=r1+r2+r3;
rp=1/((1/r1)+(1/r2)+(1/r3));
cout<<"rangkaian seri (1) atau rangkaian paralel :"<<rs<<rp<<endl;
cin>>pilih;
switch (pilih) {
case 1:
cout<<"Rangkaian seri: "<<rs<<endl;
   break;
case 2:
cout<<"Rangkaian paralel: "<<rp<<endl;
   break;
default:
cout<<"tidak ada pilihan";
break;
}
return 0;
}