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 the loop statements in computer programming, Explain the Loop State...

Explain the Loop Statements in Computer Programming? 1. C gives you a choice of three kinds of loop, while, do while and for. 2. The while loop remain repeating an action until

Make a list of functions that are standard in cpp, Make a list of functions...

Make a list of functions that are standard in C++. You must include each of the following for each function: Name of function Its parameters Data type it returns

Assignment, Write a program that computes the cost of a long distance call....

Write a program that computes the cost of a long distance call. The cost of the call is determined according to the following rate schedules. a. A call made between 8:00 AM and

Explain rules for constructing variable names in c language, Explain Rules ...

Explain Rules for constructing variable names? The Rules for constructing variable names : a) A variable name is any combination of alphabets, 0 to 9 digits and undersc

Computes the ackermann-peter a m-n function, (a) Write a procedure that com...

(a) Write a procedure that computes the Ackermann-Peter a(m,n) function. (b) Write a helper procedure that only allows the calculation of the Ackermann-Peter function for 0≤m

Identifier and constant, What are  Id e n t i f ie rs a n d C o...

What are  Id e n t i f ie rs a n d C o n s t a n ts in C++? Id e n t i f ie r a n d C o n s t a n t : I d e n t i f ie r

Area under curve., find the c program to find area under the curvey=f(x) ...

find the c program to find area under the curvey=f(x)   #include float start_point, /* GLOBAL VARIABLES */ end_point, total_area;

Linear search in array - c program, Linear search in array - C program: ...

Linear search in array - C program: Write a program in c to define a linear search in array. void main()                 {                 clrscr();

Selection sort - c program, Selection sort - C program: Write a progra...

Selection sort - C program: Write a program to define a selection sort. void main()  {   clrscr();   int a[100],ch,n;   cout   cin>>n;   for (int i=0;i

Example of pointers, #include "stdafx.h" #include iostream using name...

#include "stdafx.h" #include iostream using namespace std; int _tmain(int argc, _TCHAR* argv[]) {             int NumbHold[5];             int * ptrNumb;

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