#ifndef  DYN_ARRAY    // conditional compilation 
#define  DYN_ARRAY
template <class T>
class DynArr  {
   T*  arr;      // the array itself in form of pointer
   int size;    // size of array
   char style ; // 'F'  for fixed or 'D' for dynamic
   void Swap(T& a,T& b); 
public:
 //constructors
 //default constructor ,makes an array with 0 elements in it,style dynamic.
   DynArr();
 // constructor with size  argument ,makes an array with s elements,style fixed
   DynArr(int s);
 // copy constructor
   DynArr(const DynArr& rhs);
   // overloading the [] operator instead of get/put functions(apply )
   T& operator[](int index);
   // overloading operator '='
   DynArr& operator=(const DynArr& rhs);
   void    SelectionSort(char order='a');
};

    typedef DynArr<int> IArray; 
     typedef DynArr<float> FArray;
#endif