/*
Beginning C, Third Edition
By Ivor Horton
ISBN: 1-59059-253-0
Published: Apr 2004
Publisher: apress
*/
/* */
#include <stdio.h>
#include <string.h>
void main()
{
char *unit_words[] = {"zero", "one","two","three","four","five","six","seven","eight","nine"};
char *teen_words[] = {"ten", "eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"};
char *ten_words[] = {"error", "error","twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"};
char hundred[] = " hundred";
char and[] = " and ";
char value_str[50] = "";
int value = 0; /* Integer to be converted */
int digits[] = {0,0,0}; /* Stores digits of value entered */
int i = 0;
printf("Enter an integer less than 1000: ");
scanf("%d",&value);
if(value>=1000)
value =999;
else if(value<1)
value = 1;
while(value>0)
{
digits[i++] = value%10;
value /= 10;
}
if(digits[2] > 0)
{
strcat(strcat(value_str,unit_words[digits[2]]), hundred);
if(digits[1] >0 || digits[0] > 0)
strcat(value_str, and);
}
if(digits[1] > 0)
{
if(digits[1] == 1)
strcat(value_str,teen_words[digits[0]]);
else
{
strcat(value_str,ten_words[digits[1]]);
if(digits[0] > 0)
strcat(strcat(value_str, " "), unit_words[digits[0]]);
}
}
else
if(digits[0] > 0)
strcat(value_str, unit_words[digits[0]]);
printf("\n%s\n", value_str);
}
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