Sorting

#include <iostream>

using std::cout;
using std::cin;
using std::endl;

void main()
{

    const int size = 20;
    int arr[size];

    for (int i = 0; i < size; i++)
    {
        arr[i] = (rand() % 100);
        cout << arr[i] << "\t";
    }


    for (int i = 0; i < size; i++)
    {
        for (int j = 0; j < size; j++)
        {
            if (arr[j] < arr[j + 1])
            {
                arr[j] = arr[j] + arr[j + 1];
                arr[j + 1] = arr[j] - arr[j + 1];
                arr[j] = arr[j] - arr[j + 1];
            }
        }
    }

    cout << endl << endl;

    for (int i = 0; i < size; i++)
    {
        cout << arr[i] << "\t";
    }

    cout << endl << endl;
}