Eroare de compilare: main.cpp: In function 'int sgn(P, P, P)': main.cpp:22:20: error: no match for 'operator-' (operand types are 'P' and 'P') 22 | ld c = _(a - origin, b - origin); | ~ ^ ~~~~~~ | | | | P P In file included from /usr/include/c++/12.2.1/bits/stl_algobase.h:67, from /usr/include/c++/12.2.1/bits/specfun.h:45, from /usr/include/c++/12.2.1/cmath:1935, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:41, from main.cpp:1: /usr/include/c++/12.2.1/bits/stl_iterator.h:621:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_IteratorL>&, const reverse_iterator<_IteratorR>&)' 621 | operator-(const reverse_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/12.2.1/bits/stl_iterator.h:621:5: note: template argument deduction/substitution failed: main.cpp:22:22: note: 'P' is not derived from 'const std::reverse_iterator<_IteratorL>' 22 | ld c = _(a - origin, b - origin); | ^~~~~~ /usr/include/c++/12.2.1/bits/stl_iterator.h:1778:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)' 1778 | operator-(const move_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/12.2.1/bits/stl_iterator.h:1778:5: note: template argument deduction/substitution failed: main.cpp:22:22: note: 'P' is not derived from 'const std::move_iterator<_IteratorL>' 22 | ld c = _(a - origin, b - origin); | ^~~~~~ In file included from /usr/include/c++/12.2.1/ccomplex:39, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:54: /usr/include/c++/12.2.1/complex:362:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)' 362 | operator-(const complex<_Tp>& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/12.2.1/complex:362:5: note: template argument deduction/substitution failed: main.cpp:22:22: note: 'P' is not derived from 'const std::complex<_Tp>' 22 | ld c = _(a - origin, b - origin); | ^~~~~~ /usr/include/c++/12.2.1/complex:371:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)' 371 | operator-(const complex<_Tp>& __x, const _Tp& __y) | ^~~~~~~~ /usr/include/c++/12.2.1/complex:371:5: note: template argument deduction/substitution failed: main.cpp:22:22: note: 'P' is not derived from 'const std::complex<_Tp>' 22 | ld c = _(a - origin, b - origin); | ^~~~~~ /usr/include/c++/12.2.1/complex:380:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)' 380 | operator-(const _Tp& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/12.2.1/complex:380:5: note: template argument deduction/substitution failed: main.cpp:22:22: note: 'P' is not derived from 'const std::complex<_Tp>' 22 | ld c = _(a - origin, b - origin); | ^~~~~~ /usr/include/c++/12.2.1/complex:457:5: note: candidate: 'template<class _Tp> constexpr std::complex<_Tp> std::operator-(const complex<_Tp>&)' 457 | operator-(const complex<_Tp>& __x) Non zero exit status: 1