${\color{Red}求dalao帮调}$

[Error] conversion from 'void' to non-scalar type 'std::string {aka std::basic_string<char>}' requested

翻译：[错误] 请求从“void”转换为非标量类型“std：：string {aka std：：basic_string<char>}”

本地编译出错，P1609

代码：

#include<bits/stdc++.h>
using namespace std;
int a[110];
int main(){
	string s1;
	cin>>s1;
	while(1){
		for(int i=0;i<s1.size();i++)a[i]=s1[s1.size()-i-1]-'0';
		a[0]++;
		for(int i=0;i<s1.size();i++){
			if(a[i]>=10){
				a[i+1]+=a[i]/10;
				a[i]%=10;
			}
		}
		int t=s1.size();
		string s2;
		if(a[s1.size()+1]!=0)t++;
		for(int i=0;i<t;i++)s2[i]=a[i]+48;
		string str=reverse(s2.begin(),s2.begin()+s2.size()+1);
		s1=str;
		if(s2==str){
			cout<<s1;
			return 0;
		}
		memset(a,0,sizeof(a));
	}
	return 0;
}