Leetcode_Excel Sheet Column Title

#include <iostream>#include <string>using namespace std;class Solution {public:    string convertToTitle(int n) {string index="ZABCDEFGHIJKLMNOPQRSTUVWXYZ";string s;if(n<=0)return s;while(n>26){int i=n%26;s=index[i]+s;if(i==0)//特别把这种情况拿出来{n=(n-26)/26;}elsen=(n-i)/26;}s=index[n%26]+s;return s;            }};int main(){int n;cin>>n;Solution S;cout<<S.convertToTitle(n);return 0;}