79 lines
2.5 KiB
Java
79 lines
2.5 KiB
Java
public enum IntToWords {
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;
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private static final String[] small = {
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"", "one", "two", "three", "four",
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"five", "six", "seven", "eight", "nine",
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"ten", "eleven", "twelve", "thirteen", "fourteen",
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"fifteen", "sixteen", "seventeen", "eighteen", "nineteen"};
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private static final String[] tens = {
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"", "", "twenty", "thirty", "forty",
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"fifty", "sixty", "seventy", "eighty", "ninety"};
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private static final String[] big = {
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"", "thousand", "million", "billion", "trillion",
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"quadrillion", "quintillion"};
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public static void main(String[] args) {
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System.out.println(int2Text(0));
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System.out.println(int2Text(10));
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System.out.println(int2Text(30));
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System.out.println(int2Text(47));
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System.out.println(int2Text(100));
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System.out.println(int2Text(999));
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System.out.println(int2Text(1000));
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System.out.println(int2Text(9999));
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System.out.println(int2Text(123_456));
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System.out.println(int2Text(900_000_001));
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System.out.println(int2Text(1_234_567_890));
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System.out.println(int2Text(-987_654_321));
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System.out.println(int2Text(Long.MAX_VALUE));
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System.out.println(int2Text(Long.MIN_VALUE));
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}
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public static String int2Text(long number) {
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StringBuilder sb = new StringBuilder();
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if (number == 0) {
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return "zero";
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}
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long num = -Math.abs(number);
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int unit = 1;
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while (true) {
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int rem100 = (int) -(num % 100);
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if (rem100 >= 20) {
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if (rem100 % 10 == 0) {
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sb.insert(0, tens[rem100 / 10] + " ");
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} else {
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sb.insert(0, tens[rem100 / 10] + "-" + small[rem100 % 10] + " ");
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}
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} else if (rem100 != 0) {
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sb.insert(0, small[rem100] + " ");
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}
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int hundreds = (int) -(num % 1000) / 100;
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if (hundreds != 0) {
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sb.insert(0, small[hundreds] + " hundred ");
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}
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num /= 1000;
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if (num == 0) {
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break;
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}
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int rem1000 = (int) -(num % 1000);
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if (rem1000 != 0) {
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sb.insert(0, big[unit] + " ");
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}
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unit++;
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}
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if (number < 0) {
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sb.insert(0, "negative ");
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}
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return sb.toString().trim();
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}
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}
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