c++ 容器元素遍历打印（for_each）

#include <iostream>     // cout
#include <algorithm>    // for_each
#include <vector>       // vector
using namespace std;
void myfunction (int i) {  // function:
  cout <<"kkk"<< i;
}

struct myclass {           // function object type:
  void operator() (int i) {cout <<"ppp"<< i;}
} myobject;

int main () {
  vector<int> myvector;
  myvector.push_back(10);
  myvector.push_back(20);
  myvector.push_back(30);

  cout << "myvector contains:";
  for_each (myvector.begin(), myvector.end(), myfunction);
  cout << '\n';

  // or:
  cout << "myvector contains:";
  for_each (myvector.begin(), myvector.end(), myobject);
  cout << '\n';

  return 0;
}