C++17 STL Cookbook

How to do it...

In this section, we will read all user input from standard input, which might, for example, be a text file containing an essay. We tokenize the input to words, in order to count which word occurs how often.

1. As always, we need to include all the headers from the data structures we are going to use.

      #include <iostream>      #include <map>       #include <vector>       #include <algorithm>       #include <iomanip>

2. To spare us some typing, we declare that we use namespace std.

      using namespace std;

3. We will use one helper function in order to crop possibly appended commas, dots, or colons from words.

      string filter_punctuation(const string &s)      {          const char *forbidden {".,:; "};          const auto  idx_start (s.find_first_not_of(forbidden)); const ...