Explain hiding overloaded functions, C/C++ Programming

Assignment Help:

Hiding overloaded functions

We cannot overload a base class function by redefining it in a derived class with a dissimilar argument list. Consider examples to see if similar function name exists in base as well as derived classes.

e.g.

                class base

                 {

                  public :

                                                void f(int n )

                                                 {

                                                                cout << " n = " << n;

                                                 }

                 };

                class derived : public base

                 {

                  public :a

                                                void f(float n )

                                                 {

                                                                cout << " n = " << n;

                                                 }

                  };

                                void main()

                 {

                  derived d;

                                                d.f(1);

                }

Output :

                  n = 1.000000

Even though we have passed an integer, the compiler uses the function of the derived class because it is the one, compiler knows about. If there is no convincible match within the scope of the derived class, the inherited members from the class will not be examined. The following example shows this.

                class base

                 {

                  public :

                                                void f(char *ptr)

                                                 {

                                                                cout << " ptr = " << ptr;

                                                 }

                 };

 

                class derived : public base

                 {

                  public :

                                                void f(float n )

                                                 {

                                                                cout << " n = " << n;

                                                 }

                  };

                void main()

 {

                derived d;

 

                                d.f("A");

 }

Output:

                'Can not convert 'char*' to 'double'

 

Though, we can still access the hidden members from the base class using the scope resolution operator. So in the main if we call

d.base::f("A");

The output will be :

ptr = A

 


Related Discussions:- Explain hiding overloaded functions

Lowest cost entry, code for solving optimal solution for matrix

code for solving optimal solution for matrix

Area under curve, Write a program to find the area under the curve y = f(x)...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve betw

C program for count the no which you want , # include stdio.h> # include...

# include stdio.h> # include string.h> # include conio.h> void main() {           int i=0,j=0,b=0,count=0;           int a[100];           for(i=0;i

Class and object, write a class player that contain attributes for the play...

write a class player that contain attributes for the player,s name,average and team

HASH., Define hash functions. Explain the Division method, Mid square metho...

Define hash functions. Explain the Division method, Mid square method and Folding method of hash functions.

Jewellary shop details, Byteland county is very famous for luminous jewels....

Byteland county is very famous for luminous jewels. Luminous jewels are used in making beautiful necklaces. A necklace consists of various luminous jewels of particular colour. Nec

Explain different access specifiers in a class, Question 1 Create a class ...

Question 1 Create a class String which stores a string value. Overload ++ operator which converts the characters of the string to uppercase (toupper() library function of "ctype.h

Sort wars, Explain each of the algorithms in a way that would be understand...

Explain each of the algorithms in a way that would be understandable to an intelligent person who is not familiar with programming. You should not use any code (or even pseudo code

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd