making a object equal to another object

Question

i know you can make two objects equal to each other when one of them is being declared. i tested this in my program. but when i went to use a assignment statement it freaked out. Can you make two objects equal to each other with a assignment statement or can you only do that when one object is being declared?

Solution 1

You have provide operator= to a class so as copy the contents of another object. For example:

class A
{
  public:

   //Default constructor
   A();

   //Copy constructor
   A(const A&);

   //Assignment operator
    A& operator=(const A& a);
};

int main()
{
  A a; //Invokes default constructor
  A b(a); //Invokes copy constructor;
  A c;
  c = a; //Invokes assignment operator
}

Solution 2

Overloading assignment operator for that object can help you. (I hope you are talking about objects of same class :))

Comments

[Ahmed]

But you can use assignment (c = a) without overloading = operator

[Kiran Kumar]

Yes, that's why I wrote it as two different statements

[Martin York]

@Ahmed Said: If you do not explicitly define one then the compiler generates one automatically for you.

[Red]

some how, the code is not able to insert line by line.. i am not sure