c++ - Is std::max_element a C++11 x feature? -

do know if std::max_element c++11 feature or has existed before that. using g++ 4.8.3 , not throw warning messages requesting use -std=c++11

i posting code may people compile on machines:

#include <iostream> #include <vector> #include <algorithm> #include <vector>  class {     public:         int x;         explicit a(int x): x(x) {}         bool operator<(const a& a) { return x < a.x; } };  int main() {     std::vector<a> v;     v.push_back(a(20));     v.push_back(a(10));     v.push_back(a(15));     v.push_back(a(5));      result(*(std::max_element(v.begin(), v.end())));     std::cout << result.x;      return 0; } 

std::max_element has existed since first c++ standard.