Selection sort

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

void main()
{
    int ar[500], n, s, t;
   cout<<"Enter number of elements: ";
   cin>>n;
   cout<<"\n\n\n\n";
   for(int i=0; i<n; i++)
   {
    cout<<"Enter the value "<<(i+1)<<": ";
    cin>>ar[i];
      cout<<"\n";
   }
   cout<<"\n\n\n";
   for(int i=0; i<n; i++)
   {
    cout<<ar[i]<<" ";
   }
   for(int i=0; i<n-1; i++)
   {
    for(int j=i+1; j<n; j++)
      {
        if(ar[j]<ar[i])
         {
            ar[i]+=ar[j];
            ar[j]=ar[i]-ar[j];
            ar[i]-=ar[j];
         }
      }
   }
   cout<<"\n\nSorted array:\n\n";
   for(int i=0; i<n; i++)
   {
    cout<<ar[i]<<" ";
   }
   getch();
}