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

Data structyres, What data structure would you mostly likely see in a nonre...

What data structure would you mostly likely see in a nonrecursive implementation of a recursive algorithm?Minimum 100 words accepted#

Computer, Is computer an intelligent machine?

Is computer an intelligent machine?

Explain the formatted input output with strings, Explain the Formatted Inpu...

Explain the Formatted Input Output with Strings? These are the third set of the scanf and printf families. They are called sscanf and sprintf. sprintf Puts formatted dat

Pointer, how to use a pointer variable?

how to use a pointer variable?

Command line program to find name matches, What's a six-letter word that ha...

What's a six-letter word that has an e as its first, third, and fifth letter? Can you find an anagram of pine grave. Or how about a word that starts and ends with ant (other than a

Arrays, #questi An array of n numbers is given, where n is an even number. ...

#questi An array of n numbers is given, where n is an even number. The maximum as well as minimum of these given numbers need to be determined. Which of the following is true about

Enumeration types, Write a simple program in C++ to investigate the safety ...

Write a simple program in C++ to investigate the safety of its enumeration types. Include at least 10 different operations on enumeration types that are incorrect/unsafe things to

Static data members and static member function, Static Data Members: A ...

Static Data Members: A data member inside the class can construct as static data member.   There are few guidelines to be followed when declaring static data member.

Define register storage class - computer programming, Define Register Stora...

Define Register Storage Class - computer programming? The Storage class register notify the compiler that the associated variables must be stored in high-speed memory register.

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