What is C++ ?

 C++ programming :

C++ is a general purpose object oriented programming (oop) language developed by Bjarne Stroustrup. 

C++ was developed at AT & T's Bell laboratories of USA in early 1980's. It was expended version of 'C'. 

Difference between C and C++ :

The major difference between C and C++ is that 'C' is a procedural programming language and does not support class and object, while C++ is a combination of both procedural and object oriented programming language; therefore C++ can be called a hybrid language. 

Data types used in C++ :

Data types in C++ can be classified under various categories as shown below

c++ data types -

1) User-defined type-

     structure, union, class, enumeration

2) Built in type-

     (i)  integral - int, char

     (ii) void

     (iii) floating type - float, double

3) Derived type -

     array, function, pointer, reference

Operators used in C++ :

1) All 'C' operators are valid in C++ also. 

2) In addition C++ introduce some new operators also. 

Stream operators-

     :: ( scope resolution operator) 

     : (colon operator) 

    ・(class member access operator) 

     endl (line feed operator) 

     setus (field with operator) 

Stream operators -

     << and >> (stream operators) in C++ provide alternative to using printf (), scanf (), and other functions defined in stdio.h.

C in function. The C in function takes input from user. 

Syntax- Cin >> variable name ;

(The >> operator is thrown as the extraction or get from operator. It extracts or takes a value from keyboard. 

C out function. The C out function display output on the screen. 

Syntax- Cout << "message" << variable name<< endl ;

(The << operator is thrown as the insertion put the operator. It insert or send the contents of the variable. 

Program-

// write a C++ program to enter any two numbers and find out their sum and average

# include < iostream.h >

# include < conio.h >

void main () 

{

     into x, y ;

     float sum, average ;

     Cout << " enter the value of x =  " << x <<         endl ;

     Cin >> x ;

     Cout << " enter the value of y =  " << y <<         endl ;

     Cin >> y ;

     sum = x + y ;

     average = sum/2 ;

     Cout << " sum =  " << sum << endl ;

     Cout << " average =  " << average << endl ;

     getch () ;

}

Output :

      enter the value of x = 10

      enter the value of y = 6

      sum = 10 + 6 = 16

      average = 10 + 6 / 2 = 8

C++ is a general purpose object-oriented programming (OOP) language developed by Bjarne stroustrup. C++ was developed at AT & T's bell laboratories of U.S.A in early 1980's. C++ was expended version of C.

 C++ keywords:

asm              double           new             switch

auto             else                operator    template

break           enum             private        this

case             extern           protected     throw

catch           float              public            try  

char             for                 register       typedof  

class            friend            return           union

const           goto              short           unsigned

continue     if                   signed            virtual

default        inline            sizeof             void

delete          int                  static            volatile 

do               long                struct             while 

Added by ANSI C++

bool const_cast dynamic_cast explicit

export false mutable namespace

reinterpret_cast static_cast true typeid

typename using