Conversion from Decimal to Octal

//Decimal to Octal
#include<iostream.h>
#include<conio.h>
void main()
{
 clrscr();
 long n,dn,r,base=1,oct=0;
 cout<<"Enter any decimal value\n";
 cin>>n;
 dn=n;
 while(n>0)
 {
  r=n%8;
  oct=oct+r*base;
  n=n/8;
  base=base*10;
 }
 cout<<"Enter Number is:"<<dn<<endl;
 cout<<"Octal value is:"<<oct<<endl;
 getch();
}