How to cin to a vector

Question

I\'m trying to ask the user to enter numbers that are put into a vector, then using a function call to count the numbers, why is this not working? I am only able to count t

Answer 1

You need a loop for that. So do this:

while (cin >> input) //enter any non-integer to end the loop!
{
   V.push_back(input);
}

Or use this idiomatic version:

#include  //for std::istream_iterator 

std::istream_iterator begin(std::cin), end;
std::vector v(begin, end);
write_vector(v);

You could also improve your write_vector as:

 #include  //for std::copy

template 
void write_vector(const vector& v)
{
   cout << "The numbers in the vector are: " << endl;
   std::copy(v.begin(), v.end(), std::ostream_iterator(std::cout, " "));
}