c++ split 日期

#include <iostream>
#include <vector>
#include <string>
#include <boost/algorithm/string.hpp>
using namespace std;
int main()
{
    string str("2012-02-01 01:01:01");
    cout<<str<<endl;
    vector<string> tokens;
    boost::split(tokens, str, boost::is_any_of("-: "));
    for (size_t i = 0; i < tokens.size(); ++ i)
    {
        //cout << tokens[i] << endl;
        printf("%d ", atoi(tokens[i].c_str()));
    }
    return 0;
}