// ------------------------------------------------------------------------
  // This program is complementary material for the book:
  //
  // Frank Nielsen
  //
  // Visual Computing: Geometry, Graphics, and Vision
  //
  // ISBN: 1-58450-427-7
  //
  // Charles River Media, Inc.
  //
  //
  // All programs are available at www.charlesriver.com/visualcomputing/
  //
  // You may use this program for ACADEMIC and PERSONAL purposes ONLY. 
  //
  //
  // The use of this program in a commercial product requires EXPLICITLY
  // written permission from the author. The author is NOT responsible or 
  // liable for damage or loss that may be caused by the use of this program. 
  //
  // Copyright (c) 2005. Frank Nielsen. All rights reserved.
  // ------------------------------------------------------------------------
   
  // ------------------------------------------------------------------------
  // File: traits-numerics.cpp
  // 
  // Description: Traits class concept using the numerics class in C++
  // ------------------------------------------------------------------------
  
  include <stdafx.h>
  include <limits>
  
  using namespace std;
  
  template<class T> T MaxArray(const T* array, int n)
  {
      // Initialize the maximum value to the minimum value
      // supported by class T
      T largest = numeric_limits<T>::min();
  
      for (int i=0; i < n; ++i)
          if (array[i] > largest) largest=array[i];
  
      return largest;
  }
  
  define N 10
  
  inline double drand()
  {return rand()/(double)RAND_MAX;}
  
  int _tmain(int argc, _TCHAR* argv[])
  {
  double arrayd[N];
  int arrayi[N];
  int i;
  
  cout<<"Visual Computing: Geometry, Graphics, and Vision (ISBN:1-58450-427-7)"<<endl;
  cout<<"Demo program\n\n"<<endl;
  
  srand(2005); 
  
  cout <<"Traits class: numerical constants in class numeric_limits."<<endl;
  for(i=0;i<N;i++)
          {
          arrayd[i]=drand();
          arrayi[i]=rand();
          }
  
          cout<<"Array[double]:";
          for(i=0;i<N;i++)
          cout<<arrayd[i]<<" ";
          cout<<endl;
  
          cout<<"\nArray[int]:";
          for(i=0;i<N;i++)
          cout<<arrayi[i]<<" ";
          cout<<endl;
  
          cout<<"\nNow I call the MaxArray procedure using the traits class numerics."<<endl;
          cout<<"Max element of an integer array:"<<MaxArray(arrayi,N)<<endl;
  
          char line[256];
          cout<<"Press Return key"<<endl;
          gets(line);
  
          return 0;
  }