using namespace std in c++
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World";
system("pause");
return 0;
}using namespace std in c++
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World";
system("pause");
return 0;
}what 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;
}c++ namespace example
#include <iostream>
using namespace std;
namespace square{
int x;
int y;
}
int main(){
using namespace square;
x = 10;
y = 0;
cout << x << y << endl;
}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> {};
}Copyright © 2021 Codeinu
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