Our First Program in C++

Well..who haven't known about C++. for the ones who learn programming whether it is structure or object programming must have known about C++ compiler. This program is more difficult than Pascal language. so many requirements added in this language. but so many functions prepared from this Programming Language.

// my first program in C++
#include
using namespace std;
int main ()
{
  cout << "Hello World!";
  return 0;
}

// my first program in C++
This is a comment line. All lines beginning with two slash signs (//) are considered comments and do not have any effect on the behavior of the program. The programmer can use them to include short explanations or observations within the source code itself. In this case, the line is a brief description of what our program is.
#include
    

Lines beginning with a hash sign (#) are directives for the preprocessor. They are not regular code lines with expressions but indications for the compiler's preprocessor. In this case the directive #include tells the preprocessor to include the iostream standard file. This specific file (iostream) includes the declarations of the basic standard input-output library in C++, and it is included because its functionality is going to be used later in the program.
using namespace std;

    All the elements of the standard C++ library are declared within what is called a namespace, the namespace with the name std. So in order to access its functionality we declare with this expression that we will be using these entities. This line is very frequent in C++ programs that use the standard library, and in fact it will be included in most of the source codes included in these tutorials.
int main ()

would Read More..!