在字符串中找出连续最长的数字串

/************************************************************** * 华为笔试：在字符串中找出连续最长的数字串 **************************************************************/#include <iostream>#include <string>#include <algorithm>using namespace std;int main(){    string in;    cin >> in;    int maxLen = 0;    string out;    for (int i = 0; i < in.size(); i++)    {        int len = 0;        string tmp;        while (i < in.size() && in[i] >= '0' && in[i] <= '9')        {            tmp += in[i];            len++;            i++;        }        if (len >= maxLen)        {            maxLen = len;            out = tmp;        }    }    cout << out << endl;    cout << maxLen << endl;}