Integer to English Words
给一个数字, 返回英文表示. 从大到小判断呗..
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public class Solution { String[] digits = {"Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"}; String[] tens = {"Zero", "Ten", "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety"}; public String int2string(int n){ if (n >= 1000000000) { return int2string(n / 1000000000) + " Billion" + int2string(n % 1000000000); } else if (n >= 1000000) { return int2string(n / 1000000) + " Million" + int2string(n % 1000000); } else if (n >= 1000) { return int2string(n / 1000) + " Thousand" + int2string(n % 1000); } else if (n >= 100) { return int2string(n / 100) + " Hundred" + int2string(n % 100); } else if (n >= 20) { return " " + tens[n / 10] + int2string(n % 10); } else if (n >= 1) { return " " + digits[n]; } else { return ""; } } String numberToWords(int num) { if (num == 0) { return "Zero"; } else { String ret = int2string(num); return ret.trim(); } } } |