SELECTION SORT IN C++

#include <iostream>

void selectionSort(int AR[],int size)
{
     int i,j,temp;
     for (i=0; i<size; i++)
     {
          for (j=i+1; j<=size; j++)
          {
               if ( AR[i] > AR[j] ) // sorts in ascending order
               {
                    temp = AR[j];
                    AR[j] = AR[i];
                    AR[i] = temp;
               }
          }
     }

}

int main()
{
     int arr[20],size;
     // prompts the user to enter the elements in the array
     cout<<" Enter the no. of elements that you want to enter (max 20 ) : ";
     cin>>size;
     cout<<" Now enter the elements in the array ";
     for (int i=0; i<size; i++)
     {
          cout<<" \n Element "<<i<<" : ";
          cin>>arr[i];
     }
     selectionSort(arr,size); // calls the function to sort the array
     cout<<" \n The sorted array is as follows ";
     for (int i=0; i<size; i++)
     {
          std::cout<<" \n Element "<<i<<" : "<<arr[i];
     }
     return 0;
}