标签:trim num helper int rest part1 273 Words Integer
class Solution { private String[] lessThanTwenty = { "", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen" }; private String[] lessThanHundred = { "", "", "Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy", "Eighty", "Ninety" }; public String numberToWords(int num) { if(num<0) return ""; if(num==0) return "Zero"; return helper(num).trim(); } private String helper(int num){ if(num>=1000000000){ int part1 = num/1000000000; int rest = num%1000000000; return helper(part1).trim()+" Billion "+helper(rest).trim(); } if(num>=1000000){ int part1 = num/1000000; int rest = num%1000000; return helper(part1).trim()+" Million "+helper(rest).trim(); } if(num>=1000){ int part1 = num/1000; int rest = num%1000; return helper(part1).trim()+" Thousand "+helper(rest).trim(); } if(num>=100){ int part1 = num/100; int rest = num%100; return lessThanTwenty[part1]+" Hundred "+helper(rest).trim(); } if(num>=20){ int part1 = num/10; int rest = num%10; return lessThanHundred[part1]+" "+helper(rest).trim(); } return lessThanTwenty[num]; } }
标签:trim,num,helper,int,rest,part1,273,Words,Integer 来源: https://www.cnblogs.com/feiflytech/p/16133386.html
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