What's the difference between assignment operator and copy constructor in C++?

The Copy constructor and the assignment operators are used to initialize one object to another object. The main difference between them is that the copy constructor creates a separate memory block for the new object. But the assignment operator does not make new memory space. It uses reference variable to point to the previous memory block.

Copy Constructor (Syntax)

classname (const classname &obj) {
   // body of constructor
}

Assignment Operator (Syntax)

classname Ob1, Ob2;
Ob2 = Ob1;

Let us see the detailed differences between Copy constructor and Assignment Operator.