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🔆坚持刷算法
💎每天进步一点点
🚀冲冲冲冲冲冲冲冲冲冲
💯刷力扣 (LeetCode)刷力扣 (LeetCode)

题目💎🍭

代码💎🍭

class Solution {
public:string num0_19[20] = {"Zero", "One", "Two", "Three", "Four", "Five", "Six", "Seven","Eight", "Nine", "Ten", "Eleven", "Twelve", "Thirteen","Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen","Nineteen",};string num20_90[8] = {"Twenty", "Thirty", "Forty", "Fifty", "Sixty", "Seventy","Eighty", "Ninety",};string num1000[4] = {"Billion ", "Million ", "Thousand ", "",};string get(int x) {  // 返回1 ~ 999的英文表示string res;if (x >= 100) {res += num0_19[x / 100] + " Hundred ";x %= 100;}if (x >= 20) {res += num20_90[x / 10 - 2] + " ";x %= 10;if (x) res += num0_19[x] + ' ';} else if (x) res += num0_19[x] + ' ';return res;}string numberToWords(int num) {if (!num) return "Zero";string res;for (int i = 1e9, j = 0; i >= 1; i /= 1000, j ++ )if (num >= i) {res += get(num / i) + num1000[j];num %= i;}res.pop_back();return res;}
};

反思💎🍭

见代码

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