C++ Introduction

An Introduction To C++
     C++ is an extension to C programming Language. It is developed by Bjarne Stroustrup in 1980 at AT & T Bell Laboratories. C++  is created as a bridge between Object Oriented Programming Language and C. C++ is an object oriented programming language. C++ fully support Object Oriented Programming language with 4 main concept encapsulation, data hiding, inheritance, and polymorphism. C++ is also called a high level language. C++ programs are reusable and extensible; existing code is easily modifiable without actually having to change the code. C++ also called superset of C. C programs can be run on C++ Compiler. C language uses structure programming language while C++ uses the concept of object oriented programming language. C++ mainly focuses on Classes and Objects.
History Of C++
    C++ was designed for the UNIX system environment. With C++ programmers could improve the quality of code. Before C++, C was a programming language developed at Bell Labs. There are several versions of the C++ language, of which Visual C++ is only one.  Other include Borland C++, Turbo C++ etc.
C++ supports multiple programming styles. C++ provides more than 30 operators, almost all the operators can be overloaded. C++ gives object oriented features to C. C++ has many new keywords, such as new and class, that may be used in a C program as identifier.
A Simple Hello Program In C++
#include<conio.h>
#include<iostream.h>
int main()
{
    clrscr();
    cout << "This Is First Program" ;
    getch();
    return
}
Description Of the above program:
#include <conio.h>:
Hash sign (#) are directives for the preprocessor. Directive #include <conio.h> tells the preprocessor to include the iostream standard file.
#include <iostream.h>:
Hash sign (#) are directives for the preprocessor. Directive #include <iostream.h> tells the preprocessor to include the iostream standard file.
int main ():
From the main() the program starts its execution. main() is followed by parenthesis because main() is used as a function.
{ } (open and close curly braces): 
Opening braces are used to start execution of  block of code written in it and closing braces are used to end execution of block of code.
clrscr() : clrear the console screen.
cout :   cout is the output function in C++. It displays output on the screen.
 ; (semicolon) :
This is used for to mark the end of the statement.
getch(): get a character 
return 0 :
It tells that main function has finished.