I’m trying to write a function which sort an array and I met a problem. When I sort an array it always return 0 in first position of sorted array. No matter what combination it is.

 void sorting(int wielkosc)
{
    int t[wielkosc];
   //filling 
    for (int i = 0; i < wielkosc; i++)
    {
        t[i] = rand()% 100 + 1;
    }

    // before sort
    cout << "before sorting: " << endl;
    for (int i = 0; i < wielkosc; i++)
    {
        cout << "[" << i << "] -> " << t[i] << endl;
    }
    cout << endl;

    // asc...
    int iTemp = 0;
    for (int i = 0; i < wielkosc; i++)
    {
        for (int j = i + 1; j <= wielkosc; j++)
        {
           //jak chcesz zmienic na malejaco to se przekrec '<' na '>'
        if (t[j] < t[i])
        {

        iTemp = t[i];
        t[i] = t[j];
        t[j] = iTemp;
        }}}
    // after sorting
    cout << "after sorting: " << endl;
    for (int i = 0; i < wielkosc; i++)
    {
        cout << "[" << i << "] -> " << t[i] << endl;
    }
    cout << endl;
}

Source: Windows Questions C++