How to write vector values to a file

Question

I have a large vector.

The ways that I use multiply the run-time of the program hugely. The first is write all values to a string as they are calculated using

Answer 1

Assuming you have C++11:

#include 
#include 
#include 

int main()
{
    std::vector v{ "one", "two", "three" };
    std::ofstream outFile("my_file.txt");
    // the important part
    for (const auto &e : v) outFile << e << "\n";
}