/code_1937968.cpp: In function ‘int main()’: /code_1937968.cpp:10:19: error: ‘std::string’ has no member named ‘pop_back’

#include <iostream> #include <string> using namespace std;  int main(){     string s;          while (cin >> s) {         for (int i= s.size()-1; i>=0; i--) {             if (s[i] == '0') {                 s.pop_back();             }             else                 break;         }                  for (int i= s.size()-1; i>=0; i--) {             cout << s[i];         }                  cout << endl;     } }