C++17 STL Cookbook

How to do it...

In this section, we will implement a little tool that finds out which files in a directory are duplicates of each other. With that knowledge, it will remove all but one of all duplicated files, and substitute them with symbolic links, which reduces the folder size.

Make sure to have a backup of your system's data. We will be playing with STL functions that remove files. A simply misspelled path in such a program can lead to a program that greedily removes too many files in unwanted ways.

1. First, we need to include the necessary headers and then we declare that we use namespace std and filesystem by default.

      #include <iostream>      #include <fstream>      #include <unordered_map>      #include <filesystem>            using namespace std; using namespace ...