Question

In which of thd the given situation constructor be invoked?

Answer 1

Answer:

Explanation:

when an existing object is assigned an object of it own class

MyClass A,B;

A = new MyClass();

B=A; //copy constructor called  

if a functions receives as argument, passed by value, an object of a class

void foo(MyClass a);

foo(a); //copy constructor invoked

when a function returns (by value) an object of the class

MyClass foo ()

  {

     MyClass temp;

     ....

     return temp; //copy constructor called

  }  

Please feel free to correct any mistakes I've made; but I am more curious if there are any other situations in which the copy constructor is called.

Answer 2

The object is initialised as soon as it is created by calling its function Object().

• An object's function Object() constructor is called automatically when it is created. Constructors have no return types, not even void. A virtual function Object() constructor is impossible.
• Similar to a method, a function Object() constructor  is called when constructing a class object and is typically used to initialise the instance variables of the class. The constructors share the class name and lack a return type.
• In general, it is utilised to initialise new objects' data members. In C++, the class or structure name serves as the name of the function Object() constructor . When creating an object, the function Object() constructor is called. It creates the values, i.e., supplies the object with data, which is why it is referred to as a function Object() constructor .

#SPJ2