Explain pointers to objects, C/C++ Programming

Assignment Help:

Pointers to Objects

Passing and returning of objects is, though, not very efficient since it includes passing and returning a copy of the data members. This problem can be eliminated using pointers. Like other variables, objects of class can also have pointers. Declaring a pointer to an object of a certain class is same as declaring a pointer to a variable of any other data type. A pointer variable having the address of an object is said to be pointing to that object. Pointers to objects can be used to make a call by address or for dynamic memory allocation. Just like structure pointer, a pointer to an object also uses the arrow operator to access its members. Like pointers to other data types, a pointer to an object also has only one word of memory. It has to be made to point to an already existing object or allocated memory using the keyword 'new'.

e.g.

                string str;             // Object

                string *sp;           // Pointer to an object

                sp = &str;             // Assigns address of an existing object

                sp = new string // Allocates memory with new.

A simple example of using pointers to objects is given below.

                class player

                 {

                  public :

                                                void getstats(void);

                                                void showstats(void);

                  private :                                                            

                                                char  name[40];

                                                int   age;

                                                int   runs;

                                                int   tests;

                                                float average;

                                     float calcaverage(void);

                };

 void main()

                  {

                    player Sachin;

                                Sachin.getstats();

                                Sachin.showstats();

                  player  *Dravid;

                                Dravid = new player;

 

                                Dravid->getstats();

                                Dravid->showstats();

                  }

 


Related Discussions:- Explain pointers to objects

C program for function of average, C program for function  of average ...

C program for function  of average int average(int); void main() {           int max=0,c=0;           clrscr();           printf("ENTER THE LIMIT OF INPUT FOR AV

Explain the declaration of multi dimensional arrays, Explain the Declaratio...

Explain the Declaration of Multi Dimensional Arrays? In the figure, the range in the first dimension is 3 and in the second dimension is 4. The shaded portion corresponds to th

Decoding smugglers message, Smugglers are becoming very smart day by day. N...

Smugglers are becoming very smart day by day. Now they have developed a new technique of sending their messages from one smuggler to another. In their new technology, they are send

Equation, My project is compiling but the equation entered is not working

My project is compiling but the equation entered is not working

Minimum total number of shelv, Write a program that finds the minimum total...

Write a program that finds the minimum total number of shelv, C/C++ Programming

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