copy, iterator, vector

#include <istream>
#include <vector>
#include <algorithm>
#include <iterator>
 
 
int main( ) {
    
    std::vector <int> ivec;
    
    
    std::copy(std::istream_iterator<int, char> (std::cin), std::istream_iterator<int, char> () ,  back_inserter(ivec));
    
    std::copy(ivec.begin(), ivec.end(), std::ostream_iterator<int, char>( std::cout, " "));
    return 0;
}

#include <sstream>
#include <string>
 
// ...
 
std::string line;
std::getline(std::cin, line);
std::istringstream iss(line);
std::copy(std::istream_iterator<int>(iss), std::istream_iterator<int>(), std::back_inserter(ivec));

class NewlineAsPunct : public std::ctype<char>
{
    static const mask* GetTable()
    {
        static mask newTable[table_size];
        const mask* oldTable = classic_table();
        std::copy(oldTable, oldTable + table_size, newTable);
        newTable['\n'] = punct;
        return newTable;
    }
public:
    NewlineAsPunct() : std::ctype<char>(GetTable()) {}
};
...
std::cin.imbue(std::locale(std::cin.getloc(), new NewlineAsPunct));