Eroare de compilare: main.cpp: In function 'void cmp(point, point)': main.cpp:64:44: error: return-statement with a value, in function returning 'void' [-fpermissive] return atan2(a.y, a.x) < atan2(b.y, b.x); ^ main.cpp: In function 'double aria(int)': main.cpp:78:31: error: 'euclid' was not declared in this scope return euclid(x + 1, x - 1) * abs() ^ main.cpp:78:39: error: no matching function for call to 'abs()' return euclid(x + 1, x - 1) * abs() ^ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:47, from main.cpp:1: /usr/include/stdlib.h:774:12: note: candidate: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^~~ /usr/include/stdlib.h:774:12: note: candidate expects 1 argument, 0 provided In file included from /usr/include/c++/6/valarray:587:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/6/bits/valarray_after.h:442:5: note: candidate: template<class _Tp> std::_Expr<std::_UnClos<std::_Abs, std::_ValArray, _Tp>, _Tp> std::abs(const std::valarray<_Tp>&) _DEFINE_EXPR_UNARY_FUNCTION(abs, _Abs) ^ /usr/include/c++/6/bits/valarray_after.h:442:5: note: template argument deduction/substitution failed: main.cpp:78:39: note: candidate expects 1 argument, 0 provided return euclid(x + 1, x - 1) * abs() ^ In file included from /usr/include/c++/6/valarray:587:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:95, from main.cpp:1: /usr/include/c++/6/bits/valarray_after.h:442:5: note: candidate: template<class _Dom> std::_Expr<std::_UnClos<std::_Abs, std::_Expr, _Dom>, typename _Dom::value_type> std::abs(const std::_Expr<_Dom1, typename _Dom1::value_type>&) _DEFINE_EXPR_UNARY_FUNCTION(abs, _Abs) ^ /usr/include/c++/6/bits/valarray_after.h:442:5: note: template argument deduction/substitution failed: main.cpp:78:39: note: candidate expects 1 argument, 0 provided return euclid(x + 1, x - 1) * abs() ^ In file included from /usr/include/c++/6/ccomplex:39:0, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/complex:597:5: note: candidate: template<class _Tp> _Tp std::abs(const std::complex<_Tp>&) abs(const complex<_Tp>& __z) { return __complex_abs(__z.__rep()); } ^~~ /usr/include/c++/6/complex:597:5: note: template argument deduction/substitution failed: main.cpp:78:39: note: candidate expects 1 argument, 0 provided return euclid(x + 1, x - 1) * abs() ^ In file included from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:47:0, from main.cpp:1: