c_cpp 202.幸福数字 - 难度容易 - 2018.9.17

Posted 2021-05-14

class Solution {
public:
    bool isHappy(int n) {
        while(n >= 6) {
            int addUp = 0;
            while(n) {
                addUp += (n%10)*(n%10);
                n /= 10;
            }
            n = addUp;
        }
        return n == 1;
    }
};