FreePrograms

FREE C PROGRAMS

C Tutorial for beginners
What is C	C vs C++ vs Java	Program Structure	Data Types in C	Basic Rules of C & C++
Functions in C	If, Else Conditions	Loops in C	Switch Case	Arrays
Pointers	Structures in C	Strings in C	Command Line Arguments	Type Casting
Linked Lists	Recursion	Binary Trees	Inheritance	Multiple Inheritance
Templates	File I/O	Object Oriented Programming	Data Structures in C	C interview Questions

/Namespace Std C++/CPP Tutorial./

Namespaces allow us to combine entities like classes, objects and functions under a name.
It Introduces every name from the std namespace into the current scope block.

The keyword using (using namespace std;) is used to introduce a name from a namespace into the current area. In this example, there are two global variables with the same name: x.
One is defined within the namespace first and the other one in second.

#include <iostream.h>
using namespace std;

namespace one
{
int x = 5;
}

namespace two
{
float x = 3.1416;
}

int main () {
cout << one::x << endl;
cout << two::x << endl;
return 0;
}

FreePrograms

C Tutorial for beginners

/*Namespace Std C++/CPP Tutorial.*/

/Namespace Std C++/CPP Tutorial./