Eroare de compilare: main.cpp: In function 'int compare(punct, punct)': main.cpp:16:34: error: 'atan2' was not declared in this scope return (atan2(A.x-dx , A.y-dy) < atan2(B.x-dx, B.y-dy)); ^ main.cpp: In function 'double arie_triunghi(punct, punct, punct)': main.cpp:21:28: error: call of overloaded 'abs(double&)' is ambiguous return (abs(determinant)/2); ^ In file included from /usr/include/c++/6/cstdlib:75:0, from /usr/include/c++/6/ext/string_conversions.h:41, from /usr/include/c++/6/bits/basic_string.h:5420, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/stdlib.h:774:12: note: candidate: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^~~ In file included from /usr/include/c++/6/ext/string_conversions.h:41:0, from /usr/include/c++/6/bits/basic_string.h:5420, from /usr/include/c++/6/string:52, from /usr/include/c++/6/bits/locale_classes.h:40, from /usr/include/c++/6/bits/ios_base.h:41, from /usr/include/c++/6/ios:42, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:1: /usr/include/c++/6/cstdlib:180:3: note: candidate: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^~~ /usr/include/c++/6/cstdlib:172:3: note: candidate: long int std::abs(long int) abs(long __i) { return __builtin_labs(__i); } ^~~ main.cpp: In function 'double arie_triunghi_heron(double, double, double)': main.cpp:27:46: error: 'sqrt' was not declared in this scope double arie = sqrt(S*(S-L1)*(S-L2)*(S-L3)); ^ main.cpp: In function 'double afla_dist_intre(punct, punct)': main.cpp:33:72: error: 'sqrt' was not declared in this scope return sqrt(((A.x - B.x) * (A.x - B.x) + (A.y - B.y) * (A.y - B.y))); ^ main.cpp: In function 'int main()': main.cpp:67:27: error: 'sort' was not declared in this scope sort(v+1,v+n+1,compare); ^ Non zero exit status: 1