Trier.cpp

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#include <TRUSTVect.h>
#include <Trier.h>
 
void QuickSort(const DoubleVect& a,int g, int d, ArrOfInt& c)
{
  int t,i,j;
  double v;
  if (g < d)
    {
      if(a[c[g]]>a[c[d]])
        {
          t=c[g];
          c[g]=c[d];
          c[d]=t;
        }
      v = a[c[d]];
      i = g-1;
      j = d;
      do
        {
          do i++;
          while (a[c[i]] < v);
          do j--;
          while (a[c[j]] > v);
          t = c[i];
          c[i] = c[j];
          c[j] = t;
        }
      while (j > i);
      c[j] = c[i];
      c[i] = c[d];
      c[d] = t;
      QuickSort (a, g, i-1,c);
      QuickSort (a, i+1, d,c);
    }
}
 
void trier_abs(const DoubleVect& a, ArrOfInt& c)
{
  DoubleVect a2(a.size_array());
  c.resize_array(a.size_array());
  int i;
 
  for (i=0; i<a2.size_array(); i++) a2[i]=std::fabs(a[i]);
  for ( i=0; i<c.size_array(); i++) c[i]=i;
 
  QuickSort(a2, 0, a2.size_array()-1, c);
}
 
void trier(const DoubleVect& a, ArrOfInt& c)
{
  c.resize_array(a.size_array());
  int i;
  for (i=0; i<c.size_array(); i++) c[i]=i;
  QuickSort(a, 0, a.size_array()-1, c);
}
 
void essai()
{
  DoubleVect a(5);
  ArrOfInt c(5);
  int i;
  a[0]=-10.1;
  a[1]=8.3;
  a[2]=7.31;
  a[3]=7.3;
  a[4]=7.1;
  Cerr << "a before selecting "  << finl;
  for (i=0; i<5; i++) Cerr << a[i] << " ";
  Cerr << finl;
  trier (a,c);
  Cerr << "a after selecting " << finl;
  for ( i=0; i<5; i++) Cerr << a[c[i]] << " ";
  Cerr << finl;
  trier_abs (a,c);
  Cerr << "a after selecting abs " << finl;
  for ( i=0; i<5; i++) Cerr << a[c[i]] << " ";
  Cerr << finl;
}