answer.code: In function ‘bool rayisect(pt, pt, pt, pt, db*)’:
answer.code:35:6: error: declaration of ‘pt v’ shadows a parameter
   35 |   pt v = e1-s1, a = s2-s1, b = e2-s1;
      |      ^
answer.code:34:47: note: ‘db* v’ previously declared here
   34 | bool rayisect(pt s1, pt e1, pt s2, pt e2, db *v = NULL) {
      |                                               ^
answer.code:40:7: error: could not convert ‘v’ from ‘pt’ {aka ‘std::complex<long double>’} to ‘bool’
   40 |   if (v) *v = val;
      |       ^
      |       |
      |       pt {aka std::complex<long double>}
answer.code:40:10: error: no match for ‘operator*’ (operand type is ‘pt’ {aka ‘std::complex<long double>’})
   40 |   if (v) *v = val;
      |          ^~
In file included from /usr/include/c++/13/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:127,
                 from answer.code:1:
/usr/include/c++/13/complex:395:5: note: candidate: ‘template<class _Tp> constexpr std::complex<_Tp> std::operator*(const complex<_Tp>&, const complex<_Tp>&)’
  395 |     operator*(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:395:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   candidate expects 2 arguments, 1 provided
   40 |   if (v) *v = val;
      |           ^
/usr/include/c++/13/complex:404:5: note: candidate: ‘template<class _Tp> constexpr std::complex<_Tp> std::operator*(const complex<_Tp>&, const _Tp&)’
  404 |     operator*(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:404:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   candidate expects 2 arguments, 1 provided
   40 |   if (v) *v = val;
      |           ^
/usr/include/c++/13/complex:413:5: note: candidate: ‘template<class _Tp> constexpr std::complex<_Tp> std::operator*(const _Tp&, const complex<_Tp>&)’
  413 |     operator*(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/13/complex:413:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   candidate expects 2 arguments, 1 provided
   40 |   if (v) *v = val;
      |           ^
In file included from /usr/include/c++/13/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:166:
/usr/include/c++/13/bits/valarray_after.h:407:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   ‘pt’ {aka ‘std::complex<long double>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
   40 |   if (v) *v = val;
      |           ^
/usr/include/c++/13/bits/valarray_after.h:407:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   ‘pt’ {aka ‘std::complex<long double>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
   40 |   if (v) *v = val;
      |           ^
/usr/include/c++/13/bits/valarray_after.h:407:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
  407 |     _DEFINE_EXPR_BINARY_OPERATOR(*, struct std::__multiplies)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/valarray_after.h:407:5: note:   template argument deduction/substitution failed:
answer.code:40:11: note:   candidate expects 2 arguments, 1 provided
   40 |   if (v) *v = val;
      |           ^
/usr/include/c++/13/bits/valarray_after.h:407:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__multiplies, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__multiplies, typename _Dom1::value_type>::result_type> std::operator*(const _Expr<_Dom1,...