Explain the scope resolution operator, C/C++ Programming

Assignment Help:

The Scope Resolution Operator( :: )

Global variables are explained outside any functions and thus can be used by all the functions defined thereafter. However, if a global variable is declared with the similar name as that of a local variable of a function , the local variable is the one in the scope when the program implements that function . The C++ language provides the scope resolution operator ( :: ) to access the global variable thus overriding a local variable with the similar name. This operator is prefixed to the name of the global variable . The following example shows its usage.

                int global = 10;

                void main()

                 {

                                int global = 20;

 

                                printf(" Just writing global prints : %d\n", global);  

printf(" Writing ::global prints : %d\n", ::global);  

 }

The output of this program will be:

 Just writing global prints : 20  

 Writing ::global prints    : 10

 

 


Related Discussions:- Explain the scope resolution operator

Explain variables, Variables Information stored in a variable can alter...

Variables Information stored in a variable can alter in the course of the program. The type used in the definition explains the kind of information the symbol can store. Variab

Oop, write a program which has three classes

write a program which has three classes

Is it possible to pass an entire structure to functions, Is it possible to ...

Is it possible to pass an entire structure to functions? Yes, it's possible to pass an entire structure to a function in a call by method style. Some programmers prefer to decl

Explain reference oddities, Reference Oddities A reference variable can...

Reference Oddities A reference variable can demote to any integer variable, be it in an array or a member variable from structure or class. Reference variables can demote to co

C program to find area of rectangle, Aim: To implement a program to find a...

Aim: To implement a program to find area of rectangle, surface area of box and volume of box using virtual functions. Code:                       class rect {

C CODING, HOW THE C PROGRAM CODING IMPLEMENTED DY ITSELF UNDERSTANDING . AL...

HOW THE C PROGRAM CODING IMPLEMENTED DY ITSELF UNDERSTANDING . ALSO HOW I CAN A BECOME A GOOD PROGRAMMER IN C WHAT I DO FOR GOOD PROGRAMMING ,TELL ME HOW C CODING DEVELOP DY ITSELF

What is memory allocation, What is memory allocation? Memory Allocation...

What is memory allocation? Memory Allocation : It is the method of allocating memory storage to program in such that the program can be run.

Padovan string, padovan string for n natural numbers p(n)=1,p(n)=2,p(n)=3 a...

padovan string for n natural numbers p(n)=1,p(n)=2,p(n)=3 and use padovan formul to get output 1

Define some features of external storage class in c program, Define some fe...

Define some features of external storage class in c program? The features of an external storage class variable are as follows: Storage - memory Default initial value -

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