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

Develop a .net wrapper for a c++ dll, Develop a .NET wrapper for a C++ Dll ...

Develop a .NET wrapper for a C++ Dll Project Description: We have a classic VC++ Dll that requires a .NET wrapper built by you. Use latest Visual Studio and .Net framework sh

Create a client program tracker, This project simulates an application call...

This project simulates an application called tracker for the Department of Transportation (DOT) in which highway traffic data is accumulated in real time using various sensing equi

Add the two complex no.s given by user - c++ program, THIS PROGRAM IS TO AD...

THIS PROGRAM IS TO ADD THE TWO COMPLEX NO.S GIVEN BY THE USER  */ #include #include #include struct complex     {     int real;     int imag;     }; void main()  {  clrs

Function with unsigned char parameters, Write a function that has four uns...

Write a function that has four unsigned char parameters, combines the four one-byte integer values into an unsigned integer, and returns the unsigned integer. When the four one

Program for memory optimization of c / opencl code, Program for Memory Opti...

Program for Memory Optimization of C / OpenCL Code Project Description: This is possibly a very simple project for someone with an excellent knowledge of C and OpenCL. That,

Sequence for DMA controller, Write a sequence of instructions that transfer...

Write a sequence of instructions that transfers data from memory to an external I/O device by using channel 3 of the 8237 DMA controller. Transfer from 20000H-20FFFH.

String program, Write a C++ program which does the following: 1. Asks th...

Write a C++ program which does the following: 1. Asks the user to enter the following text "Four score and seven years ago there was a man named Joey Bagadonuts." 2. Save thi

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