153. Rules and Limitation of Virtual Function in C++ (Hindi) Video Lecture | Learn to Program with C++: Beginner to Expert (in Hindi) - Back-End Programming

hi guys its new rules for virtual
function you are even putting it put on
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function K rules which is Turkey the
virtual function must be the member of
some class while state function unable
derived class to provide its own
implementation for the function ready
defined in its base class okay
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key meaning he oughta be cut the meaning
material a septa like in Christian jokey
important in causing automatic that last
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Connie kasib anybody okay now the next
are there what your function give power
to the tribe class function to override
the function in its base class with the
same name and signature virtual function
can't be static member this is a
important rule a virtual function can't
to be static member okay three static
member name is aekta
virtual function only the functions that
are member of some class can be declared
as virtual that means we can't declare
regular function or friend function as
virtual function may be a cool has you
the other reminds a year ago cool next
our church function can be a friend of
another class okay our chill function in
a base class must be defined even though
it may not be used the virtual function
of base class in it define cannot surely
taking if one will call the virtual
function with the pointer having the
reference to is the base class object
then the function of the base class will
be called for sure the corresponding
functions in the drag class must agree
with the virtual functions name and
signature that means both must be same
name and signature so
yes there is a rule since your corner of
measure of virtual function I'm gonna
attempt ow
okay next big thing limitations of
virtual function the function called
takes slightly longer due to the virtual
mechanism and it also makes it more
difficult for the compiler to optimize
because it doesn't know exactly which
function is going to be called it come
by again
a limitation saying what's your function
KX actually if you're a schoolgirl
practically they care to say such may a
difficult ho tae compile Erica Leakey
kick owns a phone call ki jai yep home
as a function of conceivable argument
Pascal never passed your argument kiss
function code the Ajay here was a
difficult of tyronn temper so
mechanically compared to come compile
them okay in a complex system virtual
functions can make it a little more
difficult to figure out where a function
is being called from virtual functions
will usually not be in line size of
object increases due to virtual pointer
okay so a rules or limitations the
virtual function get ugly video mmm look
virtual function like example they can
was yawning icky virtual function case a
extreme of what at the high Americ
programs may kill them thanks watching
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