// Convert an integer to English written form
public class IntToEnglish {
static String[] to_19 = { "zero", "one", "two", "three", "four", "five", "six",
"seven", "eight", "nine", "ten", "eleven", "twelve", "thirteen",
"fourteen", "fifteen", "sixteen", "seventeen", "eighteen", "nineteen" };
static String[] tens = { "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "ninety"};
static String[] denom = { "",
"thousand", "million", "billion", "trillion", "quadrillion",
"quintillion", "sextillion", "septillion", "octillion", "nonillion",
"decillion", "undecillion", "duodecillion", "tredecillion", "quattuordecillion",
"sexdecillion", "septendecillion", "octodecillion", "novemdecillion", "vigintillion" };
public static void main(String[] argv) throws Exception {
int tstValue = Integer.parseInt(argv[0]);
IntToEnglish itoe = new IntToEnglish();
System.out.println(itoe.english_number(tstValue));
/* for (int i = 0; i < 2147483647; i++) {
System.out.println(itoe.english_number(i));
} */
}
// convert a value < 100 to English.
private String convert_nn(int val) throws Exception {
if (val < 20)
return to_19[val];
for (int v = 0; v < tens.length; v++) {
String dcap = tens[v];
int dval = 20 + 10 * v;
if (dval + 10 > val) {
if ((val % 10) != 0)
return dcap + "-" + to_19[val % 10];
return dcap;
}
}
throw new Exception("Should never get here, less than 100 failure");
}
// convert a value < 1000 to english, special cased because it is the level that kicks
// off the < 100 special case. The rest are more general. This also allows you to
// get strings in the form of "forty-five hundred" if called directly.
private String convert_nnn(int val) throws Exception {
String word = "";
int rem = val / 100;
int mod = val % 100;
if (rem > 0) {
word = to_19[rem] + " hundred";
if (mod > 0) {
word = word + " ";
}
}
if (mod > 0) {
word = word + convert_nn(mod);
}
return word;
}
public String english_number(int val) throws Exception {
if (val < 100) {
return convert_nn(val);
}
if (val < 1000) {
return convert_nnn(val);
}
for (int v = 0; v < denom.length; v++) {
int didx = v - 1;
int dval = new Double(Math.pow(1000, v)).intValue();
if (dval > val) {
int mod = new Double(Math.pow(1000, didx)).intValue();
int l = val / mod;
int r = val - (l * mod);
String ret = convert_nnn(l) + " " + denom[didx];
if (r > 0) {
ret = ret + ", " + english_number(r);
}
return ret;
}
}
throw new Exception("Should never get here, bottomed out in english_number");
}
}
