Reading and writing to a file

The following sections will help you to understand how to read and write to a file using the std::fstream C++ APIs.

Reading from a file

C++ provides several different methods for reading a file, including by field, by line, and by number of bytes.

Reading by field

The most type-safe method for reading from a file is by field, the code which is as follows:

#include <fstream>
#include <iostream>

int main()
{
    if (auto file = std::fstream("test.txt")) {
        std::string hello, world;
        file >> hello >&gt...