vector make_pair

boolstrict_weak_ordering(const std::pair<int,std::string> a, const std::pair<int,  std::string>  b)     

 {      

     return a.first < b.first;      

 }      

        

 int main()      

 {      

 　　using namespace std;      

        

 　　vector<pair<int, string> > vec;      

        

    vec.push_back(make_pair<int, string>(5, "hello"));      

    vec.push_back(make_pair<int, string>(4, "hell"));      

    vec.push_back(make_pair<int, string>(6, "hello,"));      

        

    sort(vec.begin(), vec.end(), strict_weak_ordering);      

        

    vector<pair<int, string> >::iterator it = vec.begin(), end = vec.end();      

    

    for(; it != end; ++it)      

    　　cout<<it->second<<endl;      

 　　return 0;        

 }