c++ for_each

 //for_each example#include <iostream>     // std::cout#include <algorithm>    // std::for_each#include <vector>       // std::vectorvoid myfunction (int i) {  // function:  std::cout << ' ' << i;}struct myclass {           // function object type:  void operator() (int i) {std::cout << ' ' << i;}} myobject;int main () {  std::vector<int> myvector;  myvector.push_back(10);  myvector.push_back(20);  myvector.push_back(30);  std::cout << "myvector contains:";  for_each (myvector.begin(), myvector.end(), myfunction);  std::cout << '\n';  // or:  std::cout << "myvector contains:";  for_each (myvector.begin(), myvector.end(), myobject);  std::cout << '\n';  return 0;}

[来自:http://www.cplusplus.com/reference/algorithm/for_each/]