Number to word convert

Q : Write a program to convert a number into its equivalent word without using character array?

/* ##########################################

     Girfa : Student Help

     Program : Number to word converter

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   ##########################################*/

#include<stdio.h>

#include<conio.h>

void single(int);

int reverce(int);

void ten(int);

void hundred(int);

void printhundred(int);

void main()

{

     int n;

     clrscr();

     printf("Enter number>> ");

     scanf("%d",&n);

     if(n>999)

          puts("Out of Range !!");

     else

     {

          if(n<10)

              single(n);

          else if(n<100)

          {

              if(n<20)

              {

                   n=reverse(n);

                   if(n==1)

                        printf(" Ten");

                   else

                        ten(n/=10);

              }

              else

              {

                   printhundred(n);

              }

          }

          else

          {

              single(n/100);

              printf(" Hundred");

              printhundred(n-(100*(reverse(n)%10)));

          }

     }

     getch();

}

void printhundred(int n)

{

     n=reverse(n);

     if(n<10)

          hundred(n);

     else

     {

          hundred(n%10);

          single(n/=10);

     }

}

void hundred(int n)

{

     char *ar[]={"","Twenty","Thirty","Forty","Fifty","Sixty","Seventy","Eighty","Ninety"};

     printf(" %s",ar[--n]);

}

void ten(int n)

{

     char *ar[]={"","Elevan","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"};

     printf(" %s",ar[n]);

}

int reverse(int n)

{

     int m=0;

     while(n>0)

     {

          m=m*10+(n%10);

          n/=10;

     }

     return m;

}

void single(int n)

{

     char *ar[]={"Zero","One","Two","Three","Four","Five","Six","Seven","EIght","Nine"};

     printf(" %s",ar[n]);

}

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