Fungsi Void

#include <iostream.h>
#include <conio.h>

void luas(int &lu,int p,int l)
{lu=p*l;}

main(){

int pj,lb,hsl;

cout<<"INI CONTOH FUNGSI VOID\n\n";
cout<<"Panjang = ";cin>>pj;
cout<<"Lebar = ";cin>>lb;

luas(hsl,pj,lb);
cout<<"\nluas = "<<hsl;

getch();}