Print_number_in_words.c

//write a program which inputs a four digit number and prints it in words
//for Ex:-
//	Input :	 4032
//	Output:	 "four thousands thirty two"

#include <stdio.h>
int main(void)
{
	int n, num, d = 0, dig[4];
	const char *ones[] = {"", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten"};
	const char *el[] = {"Ten", "Eleven", "Twelve", "Thirteen", "Fourteen",
						"Fifteen", "Sixrteen", "Seventeen", "Eighteen", "Nineteen"};
	const char *tens[] = {"", "", "Tweenty", "Thirty", "Fourty", "Fifty", "Sixty",
						  "Seventy", "Eighty", "Ninety"};
	printf("Enter a 4 digit number : ");
	scanf("%d", &num);
	n = num;
	do
	{
		dig[d] = n % 10;
		n /= 10;
		d++;
	} while (n > 0);
	if (d == 4)
		printf("%s Thousand", ones[dig[3]]);
	if (d >= 3 && dig[2] != 0)
		printf(" %s Hundred ", ones[dig[2]]);
	if (d >= 2)
	{
		if (dig[1] == 0)
			printf(" %s\n", ones[dig[0]]);
		else if (dig[1] == 1)
			printf(" %s\n", el[dig[0]]);
		else
			printf(" %s %s\n", tens[dig[1]], ones[dig[0]]);
	}
	if (d == 1 && num != 0)
		printf(" %s\n", ones[dig[0]]);
	if (num == 0)
		printf("Zero\n");
	return 0;
}