Friend Function in C++

-
Image
Friend Function in C++ Welcome to C++ Programming. In this article, we will talk about friend Function and friend Class trying to understand what do they mean and why are they useful in C++ design process. These will be the module outline we will take examples of Matrix Vector Multiplication and Linked List, and finally will end with somenotes. As you know as usual the outline will be available on the left of your slide So, let us first introduce the basic notion of friend function. On the left you have the view of ordinary function. So the situation is like this, that I have a class myclass which as some private data, it has a constructor, and it has; I am sorry if just ignore this line. I have this function written outside of this class which is trying to do something with the class. What is it doing? It takes an object of the class by reference parameter call by reference, and then it tries to print the data element component of that objective. Now, what do we know, this is pr...
Post a Comment

How to access private data members of a class in c++

-

Access Private data members of a class

                        Many people ask the same question can we access the private data member of a class the answer is yes you can access the private data member of a class and also you change the value of that data now you will say how: just remember that c++ supports pointers which is very powerful concept and it is always diffcult to manage it in large project.


                                We will use the pointer to access the private data member simple make a class x and having two private data member of type int and one public method void set() just set the variable to anything.

                    
                                Now create the main() method and make object of  x  obj then make pointer variable int *p after that we will do typecasting like that p=<int*>&obj now the last step is print the *p and you will see the value of both private data members.


                                In the end i would like to say that you have access the private data member in main method now you can change their value also.If you have any problem just do comment.



How to access private data members of a class in c++








Comments

Post a Comment

Popular posts from this blog

Friend Function in C++

-
Image
Friend Function in C++ Welcome to C++ Programming. In this article, we will talk about friend Function and friend Class trying to understand what do they mean and why are they useful in C++ design process. These will be the module outline we will take examples of Matrix Vector Multiplication and Linked List, and finally will end with somenotes. As you know as usual the outline will be available on the left of your slide So, let us first introduce the basic notion of friend function. On the left you have the view of ordinary function. So the situation is like this, that I have a class myclass which as some private data, it has a constructor, and it has; I am sorry if just ignore this line. I have this function written outside of this class which is trying to do something with the class. What is it doing? It takes an object of the class by reference parameter call by reference, and then it tries to print the data element component of that objective. Now, what do we know, this is pr...
Read more

Programming language in C++

-
Image
1.Programming language in C++ C++ is one among the world's hottest programming languages . C++ are often found in today's operating systems , Graphical User Interfaces , and embedded systems . C++ is an object-oriented programing language which provides a transparent structure to programs and allows code to be reused, lowering development costs.The general purpose programming language of c++ is to use the class shape which was not in c language.Which is created by bjarne stroustrup as an extension of c language. 2.Object Oriented Programming Object Oriented programming in c++ as the name suggests, it uses objects in programming. Object-oriented programming aims to implement real-world entities like inheritance, hiding, polymorphism, etc in programming. The main aim of OOP ( Object-oriented programming) is to bind together the info and therefore the functions that operate them in order that no other part of the code can access this data except that function...
Read more

How To Use Class and Object In C++

-
Image
Class and Object In C++                             In C++ the concept of classes and objects is very useful.Now lets see how to use it and what is the syntax.Simply the class is written same as its name like class before the main method.Class with brackets like class{}.                                   Now lets take a look to object it is a logical thing.If you have class A and we want to create its object.We will do in main method A object; The A refers to class A and object refers to the object of class A.                                    Now lets create a function in class A.We have class A{} inside the brackets we will write public: just ignore what is this just write it for now ...
Read more