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

Can copy constructor admit an object of the same class , Can copy construct...

Can copy constructor admit an object of the same class as parameter, rather than reference of the object?

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

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

Program of three numbers arguments and returns the sum , Define a procedure...

Define a procedure that takes three numbers as arguments and returns the sum of the squares of the two larger numbers.

Develop an auto-click bot, What I need is an auto-click bot. The auto-click...

What I need is an auto-click bot. The auto-click bot would ask me for a url(or it would be pre-defined too) so that it loads that specific url and click an ad automatically. This w

Explain the working of array with strings, Explain the working of Array wit...

Explain the working of Array with Strings? A string is defined in C language as an array of characters. A null character (‘\0') is automatically added to the end of the charact

Computer Science Engineering C++ Homework, Temperature Conversions. Problem...

Temperature Conversions. Problems 28 through30generate temperature-conversion tables. Use the following equations that give relationships between temperatures in degrees Fahrenheit

Write a program using a friend function, Using a Friend Using a friend ...

Using a Friend Using a friend function is quite easy. The following example explains a friend function to access members of two classes. class Bclass;

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