/in/foo.cc: In function 'std::pair<int, int> decimalToFraction(double)':
/in/foo.cc:14:15: error: '__gcd' was not declared in this scope; did you mean 'gcd'?
   14 |     int gcd = __gcd(numerator, denominator); // 计算最大公约数
      |               ^~~~~
      |               gcd