I’d like to find strings similar to the one I’m looking for in a std::vector like so:

int main() {
  std::vector<std::string> v;
  v.push_back("hellostr");
  v.push_back("thisishello");
  v.push_back("x!");

  std::cout << std::count(v.begin(), v.end(), "hello") << std::endl;
  return 0;
}

$ ./prog
2