what is namespace in c++
A namespace is a declarative region that provides a scope to the
identifiers (the names of types, functions, variables, etc) inside
it. Namespaces are used to organize code into logical groups and to
prevent name collisions that can occur especially when your code base
includes multiple librarieswhat is namespace in c++
Namespaces avoids name collisions bacause of large libraray in c++.
This feature was not supported in Cwhat is namespace in c++
//namespace is a declarative region to provide scope for identifiers
#include <bits/stdc++.h>
using namespace std; //including namespace std for cin and cout
//my custom namespace for variables and functions
namespace abc
{
void fun()
{
cout<<"Hello world"<<endl;
}
int x=10;
}
using namespace abc;
int main()
{
cout<<10;
fun();
return 0;
}access the namespace members using namespace member function
namespace Parent
{
inline namespace new_ns
{
template <typename T>
struct C
{
T member;
};
}
template<>
class C<int> {};
}access the namespace members using namespace member function
//Header.h
#include <string>
namespace Test
{
namespace old_ns
{
std::string Func() { return std::string("Hello from old"); }
}
inline namespace new_ns
{
std::string Func() { return std::string("Hello from new"); }
}
}
#include "header.h"
#include <string>
#include <iostream>
int main()
{
using namespace Test;
using namespace std;
string s = Func();
std::cout << s << std::endl; // "Hello from new"
return 0;
}Copyright © 2021 Codeinu
Forgot your account's password or having trouble logging into your Account? Don't worry, we'll help you to get back your account. Enter your email address and we'll send you a recovery link to reset your password. If you are experiencing problems resetting your password contact us
