DirtySelfRead

#include <iostream>
#include <fstream>
#include <map>
#include <iterator>
#include <string>
#include <vector>
using namespace std;


int main() {

  fstream file{ "ConsoleApplication2.cpp" };
  vector<string> text{ istream_iterator<string>{file}, istream_iterator<string>{} };
  map<string, int> counters{};
  for (auto& num : text) {
    int flag = 0;
    string temp = "";

    for (int i = 0; i < num.length(); i++)
    {
      if ((num[i] >= 'a' && num[i] <= 'z') || (num[i] >= 'A' && num[i] <= 'Z') || (num[i] >= '0' && num[i] <= '9') || num[i] == '_')
      {
        temp += num[i];
      }
      else
      {
        if ((temp[0] >= 'a' && temp[0] <= 'z') || (temp[0] >= 'A' && temp[0] <= 'Z') || temp[0] == '_')
        {
          counters[temp]++;
          temp = "";
          continue;
        }
      }
    }
  }

  for (const auto & counter : counters)
  {
    std::cout << counter.first << " <> " << counter.second << "\n";
  }

  system("pause");
  return 0;
}