1 #include <iostream> 2 #include <string> 3 #include <vector> 4 #include <algorithm> 5 using namespace std; 6 14 int main(int argc, const char *argv[])15 {16     vector<int> vec;17 18     vec.push_back(99);19     vec.push_back(87);20     vec.push_back(59);21     vec.push_back(43);22     vec.push_back(78);23     vec.push_back(91);24 25 26     int cnt = 27         std::count_if(vec.begin(), vec.end(), 28                 [](int i){return i >= 80;});//lamdba表达式29     cout << cnt << endl;30 31 32     return 0;33 }