Eroare de compilare: main.cpp: In function 'float cross(const pt&, const pt&, const pt&)': main.cpp:29:36: error: no match for 'operator-' (operand types are 'const float' and 'const pt') 29 | return (b.x-a.x)*(c.y-a.y)-(b.y-a,y)*(c.x-a.x); | ~~~^~ | | | | | const pt | const float In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/ios:40, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/sstream:38, from /usr/include/c++/10/complex:45, from /usr/include/c++/10/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54, from main.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:525:5: note: candidate: 'template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const std::reverse_iterator<_Iterator>&, const std::reverse_iterator<_IteratorR>&)' 525 | operator-(const reverse_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:525:5: note: template argument deduction/substitution failed: main.cpp:29:37: note: mismatched types 'const std::reverse_iterator<_Iterator>' and 'const float' 29 | return (b.x-a.x)*(c.y-a.y)-(b.y-a,y)*(c.x-a.x); | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:67, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/ios:40, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/sstream:38, from /usr/include/c++/10/complex:45, from /usr/include/c++/10/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54, from main.cpp:1: /usr/include/c++/10/bits/stl_iterator.h:1566:5: note: candidate: 'template<class _IteratorL, class _IteratorR> decltype ((__x.base() - __y.base())) std::operator-(const std::move_iterator<_IteratorL>&, const std::move_iterator<_IteratorR>&)' 1566 | operator-(const move_iterator<_IteratorL>& __x, | ^~~~~~~~ /usr/include/c++/10/bits/stl_iterator.h:1566:5: note: template argument deduction/substitution failed: main.cpp:29:37: note: mismatched types 'const std::move_iterator<_IteratorL>' and 'const float' 29 | return (b.x-a.x)*(c.y-a.y)-(b.y-a,y)*(c.x-a.x); | ^ In file included from /usr/include/c++/10/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54, from main.cpp:1: /usr/include/c++/10/complex:361:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const std::complex<_Tp>&, const std::complex<_Tp>&)' 361 | operator-(const complex<_Tp>& __x, const complex<_Tp>& __y) | ^~~~~~~~ /usr/include/c++/10/complex:361:5: note: template argument deduction/substitution failed: main.cpp:29:37: note: mismatched types 'const std::complex<_Tp>' and 'const float' 29 | return (b.x-a.x)*(c.y-a.y)-(b.y-a,y)*(c.x-a.x); | ^ In file included from /usr/include/c++/10/ccomplex:39, Non zero exit status: 1