#include <cstdlib>
#include <iostream>

int vergleich(const double* x, const double* y)
{
  return *x - *y;
}

int main()
{
  using namespace std;
  double arr[] = { 3, 5, 4, 1, 2 };

  qsort(arr, 5, sizeof(double), 
        (int (*)(const void*, const void*)) vergleich);

  cout << arr[0] << "..." << arr[4] << '\n';
}