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

Recursion, Given a string, print all possible palindromic partitions using ...

Given a string, print all possible palindromic partitions using recursion

Library functions, is getchar() is a C++ library function?

is getchar() is a C++ library function?

C language, WHAT IS A C LANGUAGE? C IS A PROGRAMMING?

WHAT IS A C LANGUAGE? C IS A PROGRAMMING?

Keywords in cpp, Define Keywords in C++ K e y w o r d s: ...

Define Keywords in C++ K e y w o r d s: K e y w o rd s a r e t h e w o rd s a l r e a d y u s e d b y C + + i n i t s c

Padovan string, example of padovan string program

example of padovan string program

Record of student and calculating marks using ctotal, reocord of a student ...

reocord of a student and a function ctotal to calculate the marks of any three subject by using ctotal() function

Describe the oops concept - class, There are so many different concepts rel...

There are so many different concepts related with OOP (Object-oriented programming) such as: Class Object Inheritance Polymorphism Abstraction Encapsulation

What is abstraction?, What is abstraction? - Simplified view of an obje...

What is abstraction? - Simplified view of an object in user's language is termed as abstraction. - It's the simplest, well-defined interface to an object in OO and C++ which

What is difference between require_once () and require(), What is differenc...

What is difference between require_once (), require(), include()? require() includes and evaluates a specific file, if file isn't found then it shows a Fatal Error. require_

Define the char data type of c language, Define the Char Data Type of C Lan...

Define the Char Data Type of C Language? The char defines characters. The char type will usually require only 1 byte of internal storage. Every char type has an equivalent inte

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