How to install prebuilt code in Visual Studio 2017 template?

Question

C++ / C#

Hello.
There is a code

#include <iostream>
#include <string>
#include <fstream>      // std::ofstream
using namespace std;
int main()
{
  ifstream in("game.log");
  while (!in.eof())
  {
    string str;
    getline(in, str);
    if (str.find("score") != string::npos)
    {
      cout << str.c_str() << "\n";
    }
  }
  in.close();
  string buff;
  cin >> buff;
  return 0;
}

I want to stick it into the window template (visual studio 2017 program) - namely, into the template called "Windows Classic Application"