Program to Swap the elements of two given Arrays

#include<iostream.h>
#include<conio.h>
void main()
{
  clrscr();
  int ar[100];
  int ar2[100];
  int r1,r2,i,t=0,l;
  for(i=0;i<100;i++)
  {
    ar[i]=0;
    ar2[i]=0;
  }
  cout<<"Enter the range of two arrays:(less than 100) "<<endl;
  cin>>r1>>r2;
  cout<<"Enter the elements of the first array:"<<endl;
  for(i=0;i<r1;i++)
  {
       cout<<"Enter element number:"<<(i+1)<<endl;
       cin>>ar[i];
  }
  cout<<"Enter the elements of the second array:"<<endl;
  for(i=0;i<r2;i++)
  {
       cout<<"Enter element number: "<<(i+1)<<endl;
       cin>>ar2[i];
  }
  if(r1<r2)
    l=r1;
  else
    l=r2;
  for(i=0;i<l;i++)
  {
         t=ar[i];
         ar[i]=ar2[i];
         ar2[i]=t;
  }
  cout<<"The swapped arrays are: \nfirst second \n");
  for(i=0;i<l;i++)
  {
    cout<<ar[i];
    cout<<ar2[i];
    cout<<"\n";
  }
  getch();
}