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

Define a complex number in c program, Define a complex number in c program:...

Define a complex number in c program: class complex                                 {                                   private:                                 in

In binary mode how can i open a stream?, A: Use std::ios::binary. Some o...

A: Use std::ios::binary. Some operating systems differentiate among text and binary modes. In text mode, end-of-line sequences and perhaps other things are translated; in binary

Substitution model, (a) Write a procedure called (mult x y) that multiplies...

(a) Write a procedure called (mult x y) that multiplies two numbers x and y in a recursive manner using successive addition. Specifically, note that a x b = a + a + .... + a (b tim

Give a formal expression of the specification, A function REPAT is specifie...

A function REPAT is specified below. Function REPAT(c in Char, i in Int, s in mString) return in mString pre 1 ≤ i ≤ the length of s. post The returned value is a string identic

Super ASCII string checker, In the Byteland country a string "s" is said to...

In the Byteland country a string "s" is said to super ascii string if and only if count of each charecter in the string is equal to its ascci value in the byteland country ascii co

For loop, write a c++ program for the sum of 10 numbers and print out the a...

write a c++ program for the sum of 10 numbers and print out the average

Simple object-oriented program, This assignment is to be undertaken individ...

This assignment is to be undertaken individually - no group work is permitted. Background information This assignment is an exercise in simple object-oriented programming and, acco

String, A string is said to be "Beautiful"€, if it contains only non repet...

A string is said to be "Beautiful"€, if it contains only non repetitive alphabets

How comment symbols help in debugging the code, How does placing some code ...

How does placing some code lines between comment symbols help in debugging the code? - Placing comment symbols /* */ around a code separates some code that coder believes might

Car rental system, complex coding with structure and file handling

complex coding with structure and file handling

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