Calculate your age using a constant current year.

cpsc120_age.cc

// Gist https://gist.github.com/440681ee258659c96d40eb9eb60b14e5

#include <iostream>
#include <string>

const int kThisYear{2022};

int main(int argc, char const *argv[]) {
  int your_birth_year{0};
  std::cout << "What year where you born? ";
  std::cin >> your_birth_year;
  int age{kThisYear - your_birth_year};
  std::cout << "You were born in " << your_birth_year
            << " which means that you are " << age << " years old.\n";
  return 0;
}