如何读取一行中的多个数据

如何读取一行中的多个数据

#include <iostream>
#include <fstream>
#include <vector>
#include <iterator>

using namespace std;

int main( int argc, char **argv )
{
        vector<int> v;
        ifstream in("1.txt");
        if (in) {
                copy(istream_iterator<int>(in), istream_iterator<int>(), back_inserter(v));
                copy(v.begin(), v.end(), ostream_iterator<int>(cout, " "));
                /*
                for (int i = 0; i < v.size(); i++) {
                        cout << v[i] << " ";
                }
                */
        }
    return 0;
}

from：
http://bbs.chinaunix.net/viewthread.php?tid=1218395