//	Ex513.cc

//	Sec. 5.1 of lecture
//	Array: Pivot for a vector
//		a.out < input.513{a,b,c}

#include <iostream.h>
#include <float.h>

main()
{
 const int N=10;
 double x[N], xmin, xmax, tmp;
 int    kmin, kmax, i;
//                               Initialize x
 for (i = 0; i < N ; i++)
   {
     cin >> x[i];
   }
//				 Print orig. vector
 cout << endl << " Orig. vector" << endl;
 for (i = 0; i < N ; i++)
   {
     cout << "  " << x[i];
   }
 cout << endl;
//                               Initialize min/max 
 xmin =  DBL_MAX;		// in float.h
 xmax = -DBL_MAX;
//				 Initialize indices
 kmin = kmax = -1;
//				 Determine min/max
 for (i = 0; i < N; i++)
   {
     if ( xmin > x[i] )
      {
       xmin = x[i];
       kmin = i;
      }
     if ( xmax < x[i] )
      {
       xmax = x[i];
       kmax = i;
      }
   }
//				Swap Pivot elements
//			Do nothing for N=0 or constant vector
 if ( kmax != kmin )
  {
   tmp     = x[kmin];
   x[kmin] = x[kmax];
   x[kmax] = tmp;
  }
 else
  {
   cout << endl << " Nothing to swap";
  }
//				 Print Pivot vector
 cout << endl << " Pivot vector" << endl;
 for (i = 0; i < N ; i++)
   {
     cout << "  " << x[i];
   }
 cout << endl;
}