题解 | #字符串中找出连续最长的数字串#

#include <iostream>
using namespace std;
#include<string>
int main() {
    string str;
    string cur;
    string ret;
    cin>>str;
    int i=0;
    while(i<=str.size())
    {
         if('0'<=str[i]&&str[i]<='9')
         {
            cur+=str[i];
         }
         else
         {
           if(cur.size()>ret.size())
           {
               ret=cur;
               cur.clear();
           }
           else {
              cur.clear();
           }
         }
         i++;
    }
    
    cout<<ret<<endl;
    return 0;
}