c++17

#include <iostream>
#include <string>
#include <optional>


int numberOfOccurences(wchar_t character, std::optional<std::wstring> string) {
  if(!string) return 0;
  int i = 0;
  for(auto c : *string) {
    if(c == character) i++;
  }
  return i;
}

int main() {
  std::cout << numberOfOccurences(L'🤔', {L"is this bait 🤔🤔🤔?"}) << std::endl;
  std::cout << numberOfOccurences(L'🤡', std::nullopt) << std::endl;
}