Write a recursive function that displays a positive integer in words.

Write a recursive function that displays a positive integer in words. 
Ex: if the integer is 465 then it is displayed as: FOUR SIX FIVE

Program:

#include <stdio.h>

void rec(int n)

{

               if((n/10)>0)

                              rec(n/10);

               int r=n%10;

               switch(r)

               {

                              case 0:

                                                            printf("zero");

                                                            break;

                              case 1:

                                                            printf("one ");

                                                            break;

                              case 2:

                                                            printf("two ");

                                                            break;

                              case 3:

                                                            printf("three ");

                                                            break;

                              case 4:

                                                            printf("four ");

                                                            break;

                              case 5:

                                                            printf("five ");

                                                            break;

                              case 6:

                                                            printf("six ");

                                                            break;

                              case 7:

                                                            printf("seven ");

                                                            break;

                              case 8:

                                                            printf("eight ");

                                                            break;

                              case 9:

                                                            printf("nine ");

                                                            break;

               }

}

main()

{

               int n;

               printf("enter a number");
               scanf("%d",&n);

               rec(n);

}

Output