力扣 1295. 统计位数为偶数的数字 难度：简单—给你一个整数数组 nums，请你返回其中位数为 偶数 的数字的个数

Question

将 int tmpCount = 0;这一行写到for循环外面就不能AC，why? ,比如这样

class Solution {
    public int findNumbers(int[] nums) {
        int count = 0,tmpCount = 0;
        for(int i = 0;i<nums.length;i++){
            while(nums[i]>0){
                tmpCount = tmpCount+1;
                nums[i] = nums[i]/10;
            }
            if(tmpCount%2==0){
                count = count+1;
            }
            tmpCount = 0;
        }
        return count;
    }
}

这是能AC的

class Solution {
    public int findNumbers(int[] nums) {
        int count = 0;
        for(int i = 0;i<nums.length;i++){
            int tmpCount = 0;
            while(nums[i]>0){
                tmpCount = tmpCount+1;
                nums[i] = nums[i]/10;
            }
            if(tmpCount%2==0){
                count = count+1;
            }
        }
        return count;
    }
}

看评论区有这样写的，觉得很牛，像脑筋急转弯一样

 class Solution {
    public int findNumbers(int[] nums) {
        int count = 0;
        for(int num:nums){
            if((num>=10&&num<100)||(num>=1000&&num<10000)||(num==100000)){
                count++;
            }
        }
        return count;
    }
}

Answer 1

确定最后一个可以通过？

这样还可以

public static int findNumbers(int[] nums) {
        int count = 0;
        for(int num:nums){
            if (num % 2 == 0 && num != 0) {
                count++;
            }
        }
        return count;
    }