小编vat*_*sal的帖子

#include<iostream>
#include<string>
#include<sstream>

using namespace std;

int main(){
    stringstream ss;
    ss << 32;
    string str = ss.str();
    cout << str << endl
         << str[0] << endl
         << str[1] <<endl
         << str[0]%10;
    return 0;
}

输出是:

32
3
2
1

相反,最后一行应为3,因为3%10 = 3.