Copy Constructor 2

• Code for creating copy is made by the compiler
• If available, compiler calls the copy constructor after allocating memory for objects

class IntArray
{
public:
  IntArray  ( size_t sz = 10 , int ivalue = 0 );
  ~IntArray ();
  IntArray  (const IntArray& a);
  ...
} ;

IntArray::IntArray  (const IntArray& a) : size_(a.size_) , data_(nullptr)
{
  data_ = new int [size_];  // check for failed allocation
  for (size_t i = 0; i < size_; ++i)
    data_[i] = a.data_[i];
}