Getting input directly into a vector in C++

Question

Consider the following code piece:

...
int N,var;
vector nums;
cin >> N;
while (N--)
{
   cin >> var;
   nums.push_back(var);
}
...
         


        

Answer 1

No need to allocate the vector and then resize it.

Iterators are preferable to index usage.

size_t N;
std::cin >> N;

std::vector values(N);
for (vector::iterator iter = values.begin(); iter != values.end(); ++iter)
{
  std::cin >> *iter;
}