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

You can just use file >> number for this. It just knows what to do with spaces and linebreaks.

For variable-length array, consider using std::vector.

This code will populate a vector with all numbers from a file.

int number;
vector numbers;
while (file >> number)
    numbers.push_back(number);