Extension .cxx for ?

.c for c programs
.cpp for c++ programs
.cxx for ?

Answer: That too for C++. ".CXX" is an old-style extension for C++ source files the X is supposed to represent plus signs turned 45 degree.

Source: http://stackoverflow.com/questions/5171502/c-vs-cc-vs-cpp-vs-hpp-vs-h-vs-cxx

Recursion (Recursive Function) :

Recursion (Recursive Function) :

When a function of body calls the same function then it is called as 'recursive function.'

Example:

Recursion()

{

        printf("Recursion !");

        Recursion();

}

Program :

#include <stdio.h>

#include <conio.h>

Recursion()

{

        int no;

        printf("\nRecursion... ");

        printf("\n\n Enter Number : ");

        scanf("%d",&no);

        if (no==3)

               exit(0);

        else

               Recursion();

}

void main()

{

        clrscr();

        Recursion();

}

Output :

Recursion...

 Enter Number : 2

Recursion...

 Enter Number : 1

Recursion...

 Enter Number : 3_

Features :

·         There should be at least one if statement used to terminate recursion.

·         It does not contain any looping statements.

Advantages :

·         It is easy to use.

·         It represents compact programming strctures.

Disadvantages :

·         It is slower than that of looping statements because each time function is called.

Note :

·         It can be applied to calculate factorial of a number, fibonancci series.