Read integers from file - line by line

Question

How can I read integers from a file to the array of integers in c++? So that, for example, this file\'s content:

23
31
41
23

would become:<

Answer 1

don't use array use vector.

#include 
#include 
#include 

int main()
{
    std::ifstream      file("FileName");
    std::vector   arr(std::istream_iterator(file), 
                           (std::istream_iterator()));
                       // ^^^ Note extra paren needed here.
}