C++ is a high-level computer proramming language It is used to develop a wide variety of applications. C++ contains what C language does, and its compilers are compatible with C syntax. The difference is that C++ adds the power of OOP (object-oriented programming).

To run C++ codes, you will need a C++ compiler. if you are using Windows, you can download Borland C++Builder - http://www.codegear.com/downloads/free/cppbuilder

Include a File & Main Function

Let's see an example of C++:

#include <iostream>
int main(){
	cout <<"Hello";
}

In this program, the first line include a header file "iostream":

#include <iostream> 

A number sign (#) are directives for the preprocessor. the directive #include <iostream> 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++.

In this program, the second line defines the main function.

int main () 

All C++ programs start their execution from the main function. In other words, all C++ programs have a main function, which is always the first ones to be executed in any C++ program.

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