数组存放每一次运算后的结果，若有重复则满足小明心意。

#include <iostream>  using namespace::std;
using std::cout;
using std::cin; int pfh(int n)
{int sum = 0;while(n != 0){int t=n%10;sum = sum+t*t;n = n/10;}return sum;
}int wlxm(int n)
{int js=0;int nums[1000];while(n != 1){nums[0]=n;n=pfh(n);for(int i=0; i<=js; i++){if(nums[i] == n){return 0;}}js++;nums[js]=n;}return 1;
}int main() 
{int n;cin >> n;int flat=wlxm(n);if(flat == 1){std::cout << "yes";}else{std::cout << "no";}return 0;  
}