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

basic salary of employees & calculate net salary, basic salary of employee...

basic salary of employees & calculate net salary in C++ Programming

Create three classes program in cpp, In this worksheet you are asked to wri...

In this worksheet you are asked to write three classes in C++: Lecture class, Course class and University class. The classes relate to each other in the way that a Course has many

Explain input output function, Input Output Most languages have "statem...

Input Output Most languages have "statements" to perform I/O . Though in C and C++ we use "functions" to perform I/O. C++ also has its own I/O mechanism - the cin and cout obje

Application to maintain soccer team information, Write a C program "team.c"...

Write a C program "team.c" that maintains information for a soccer team. The program will allow you to add and delete players from your team, to search your team for players by nam

I want a craiglist poster required, Project Description: I want someone ...

Project Description: I want someone who can post ads for me on Craiglist . I will pay 3$ per ad i need about 30-40 ads per day . Skills required: C Programming, MySQL, Jav

DECODE, Smugglers are becoming very smart day by day. Now they have develop...

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

Read numbers form user and place them in array, Read numbers form user and ...

Read numbers form user and place them in array: Program is to read a group numbers of numbers form user and place them in array type of float and sort them void sort(floa

Insertion sort - c program, Insertion sort - C program: Write a progra...

Insertion sort - C program: Write a program in c to define a insertion sort. void main()  {   clrscr();   int a[100],ch,n;   cout   cin>>n;   for (int i=0

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