3 when an object is constructed based on another

This preview shows page 24 - 42 out of 42 pages.

3. When an object is constructed based on another object of the same class. 4. When compiler generates a temporary object.
Image of page 24

Subscribe to view the full document.

Image of page 25
When one constructor (either parameterized or copy) is provided, it is mandatory to provide default constructor
Image of page 26

Subscribe to view the full document.

Argument to Copy constructor must be constant When objects are returned the argument of copy constructor should be const Because compiler will create temporary object and invoke copy constructor to copy values from temporary object compiler created temporary objects cannot be bound to non-const references
Image of page 27
Image of page 28

Subscribe to view the full document.

Image of page 29
Why argument to a copy constructor must be passed as a reference? A copy constructor is called when an object is passed by value. Copy constructor itself is a function. So if we pass argument by value in a copy constructor, a call to copy constructor would be made to call copy constructor which becomes a non-terminating chain of calls. Therefore compiler doesn’t allow parameters to be pass by value.
Image of page 30

Subscribe to view the full document.

Image of page 31
Image of page 32

Subscribe to view the full document.

Image of page 33
Image of page 34

Subscribe to view the full document.

Image of page 35
Image of page 36

Subscribe to view the full document.

Image of page 37
Image of page 38

Subscribe to view the full document.

Image of page 39
Image of page 40

Subscribe to view the full document.

Image of page 41
In Lab Practice Develop a class complex numbers Develop a class vector, dynamically allocate memory
Image of page 42
  • Winter '16
  • DR. JANAKI MEENA
  • C++ Programming, Method, Pointer, Garbage collection, copy constructors

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern