1 #include <algorithm> 2  3 #include <iostream> 4 #include <vector> 5 #include <string> 6  7 using std::vector; 8 using std::string; 9 using std::cout;10 using std::endl;11 12 template<class InputIter, class Func>13 Func LTM_for_each(InputIter first, InputIter last, Func func)14 {15     while (first != last)16     {17         func(*first);18         ++first;19     }20     return func;21 }22 23 void helperFunction(string& str)24 {25     str += ".cpp";26 }27 28 void print(vector<string> vec)29 {30     vector<string>::iterator iter;31     for (iter = vec.begin(); iter != vec.end(); iter++)32     {33         cout << *iter << endl;34     }35     cout << ‘\n‘;36 }37 38 int main(void)39 {40     vector<string> vec;41     vec.push_back("a");42     vec.push_back("b");43     vec.push_back("c");44     vec.push_back("d");45     print(vec);46 47     // for_each(vec.begin(), vec.end(), helperFunction);48     LTM_for_each(vec.begin(), vec.end(), helperFunction);49     print(vec);50 51     return 0;52 }