// demonstrates overloaded assingment with an object containing array
// Mikhail Nesterenko
// 11/2/2014


class MyClass{
public:
   MyClass(int); // regular constructuctor
   MyClass&operator= (const MyClass&); // overloaded assingment

   void addNum(int); // regular member function
private:
   int *d; 
   int size;
};


MyClass::MyClass(int n){
   size=n;
   d = new int[size];
   for(int i=0; i< size; ++i) d[i]=0;
}


MyClass& MyClass::operator= (const MyClass& rhs){
   if (this != &rhs){ // if not same
      size=rhs.size;
      delete [] d;   
      d=new int[size];
      for (int i=0; i < size; i++) 
	 d[i]=rhs.d[i];
   }
   return *this; // return lhs
}


// adds "n" to every element of the array
void MyClass::addNum(int n){
   for(int i=0; i < size; ++i)
      d[i] += n;
}

int main(){
   MyClass firstObj(5); // constructor allocates dynamic array
   firstObj.addNum(10); // adding ten to elements

   MyClass secondObj(22), thirdObj(33);

   firstObj = firstObj; // self-assignment

   thirdObj = secondObj = firstObj;  // stacked assignment
}