Program to find the Largest and Smallest element in the given array

#include<iostream.h>
#include<conio.h>
void main()
{
  clrscr();
  int ar[100];
  int r,l,s,i;
  for(i=0;i<100;i++)
  {
    ar[i]=0;
  }
  cout<<"Enter the size of the array:(less than 100) "<<endl;
  cin>>r;
  cout<<"Enter the elements of the array:"<<endl;
  for(i=0;i<r;i++)
  {
    cout<<"Enter element number:"<<(i+1)<<endl;
    cin>>ar[i];
  }
  l=s=ar[0];
  for(i=1;i<r;i++)
  {
if(l<ar[i])
     l=ar[i];
if(s>ar[i])
     s=ar[i];
  }
  cout<<"The largest of the elements is: and the smallest of the elements is:"<<endl<<l<<endl<<s<<endl;
  getch();
}