JZ31-整数中1出现的次数
整数中1出现的次数(从1到n整数中1出现的次数)
https://www.nowcoder.com/practice/bd7f978302044eee894445e244c7eee6?tpId=13&tags=&title=&diffculty=0&judgeStatus=0&rp=1&tab=answerKey
class Solution { public int NumberOf1Between1AndN_Solution(int n) { if (n <= 0) { return 0; } int count = 0; for (int i = 1; i <= n; i++) { int temp = i; while (temp > 0) { if (temp % 10 == 1) { count++; } temp = temp / 10; } } return count; } }https://leetcode-cn.com/problems/1nzheng-shu-zhong-1chu-xian-de-ci-shu-lcof/solution/mian-shi-ti-43-1n-zheng-shu-zhong-1-chu-xian-de-2/