Differences between a pointer and a reference, C/C++ Programming

Assignment Help:

Differences between a pointer and a reference

1.  A reference must always point to some object where as this restriction is not imposed on a pointer.

e.g.

int *pi = 0;           // pointer can point to no object.

const int &ri = 0      would be converted as ,

int temp = 0;

const int &ri = temp;

2. The assignment of one references with other changes the object being referenced and not the reference itself.

e.g.

 int ival1 = 1000, ival2 = 2000;

 int *pi1 = &ival1, *pi2 = &ival2;

 int &ri1 = ival1, &ri2 = ival2;

pi1 = pi2;

 

  • ival1 remains unchanged but pi1 and pi2 now address the same object ival2.

ri1 = ri2;

  • ival1 becomes 2000. ri1 and ri2 still refer to ival1 and ival2 respectively.

 


Related Discussions:- Differences between a pointer and a reference

GPA Calculator, I am having trouble declaring a variable and returning a va...

I am having trouble declaring a variable and returning a value from my function.

Board coloring, in this problem you are given a board in which some of the ...

in this problem you are given a board in which some of the elements are placed as shown in below diagram.each element represent a color.fill the other element in the board,such tha

Arrays, how to write the code for operation research

how to write the code for operation research

Programming Assignment 4, For this program, you are going to modify your pr...

For this program, you are going to modify your previous program (program 3) so that it will now have a menu to see if the user wants to read the input from a file or interactively.

Want an ea project for jack bsher, Want an EA project for Jack Bsher Pro...

Want an EA project for Jack Bsher Project Description: New EA game Skills required   Android, C++ Programming, PHP, Metatrader, SQL

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 between two points can b

Explain the macros, Explain the Macros? Preprocessor' is a translation ...

Explain the Macros? Preprocessor' is a translation stage that is applied to your source code before the compiler proper gets its hands on it. Usually the preprocessor performs

C program for radius of circle, C Program for RADIUS OF CIRCLE   #de...

C Program for RADIUS OF CIRCLE   #define PI 3.14159 main() {           float r,a;           clrscr();           printf("ENTER THE RADIUS OF A CIRCLE: ");

Student, Ask4. Write a query to display the columns listed below. The query...

Ask4. Write a query to display the columns listed below. The query should list each customer in which the video rental is overdue. The Days_Overdue column should calculate the numb

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