Function main

01.10-compoundRequirement1/main.cpp:66–74

int main()
{
  printf("%d\n", Add(2, 3, 4));

  printf("%d\n", Add(2, 5));

  auto a = Add(Rational{3, 4}, Rational{4, 4}, Rational{5, 4});
  printf("%d/%d\n", a.Numerator(), a.Denominator());
}