标签:10 num string res 整数 273 英文 small return
1 //用到了贪心思想 2 class Solution 3 { 4 public: 5 string small[20] = {"Zero","One","Two","Three","Four","Five","Six","Seven","Eight","Nine","Ten", 6 "Eleven","Twelve","Thirteen","Fourteen","Fifteen","Sixteen","Seventeen","Eighteen","Nineteen"}; 7 string decade[10] = {"","","Twenty","Thirty","Forty","Fifty","Sixty","Seventy","Eighty","Ninety"}; 8 string big[4] = {"Billion","Million","Thousand"," "}; 9 public: 10 string numberToWords(int num) 11 { 12 if(!num) return small[0]; 13 14 string res; 15 for(int i = 1000000000,j = 0;i > 0;i /= 1000,j ++) 16 { 17 if(num >= i) 18 { 19 res += get_part(num / i) + big[j] + ' '; 20 num %= i; 21 } 22 } 23 while(res.back() == ' ') res.pop_back(); 24 return res; 25 } 26 27 string get_part(int num)//0-999的数 28 { 29 string res; 30 if(num >= 100) 31 { 32 res += small[num / 100] + " Hundred "; 33 num %= 100; 34 } 35 if(!num) return res; 36 if(num >= 20) 37 { 38 res += decade[num / 10] + ' '; 39 num %= 10; 40 } 41 if(!num) return res; 42 res += small[num] + ' '; 43 return res; 44 } 45 };
此题很难
标签:10,num,string,res,整数,273,英文,small,return 来源: https://www.cnblogs.com/yuhong1103/p/12561885.html
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