Eroare de compilare: main.cpp: In function 'int ccw(point, point, point)': main.cpp:115:16: error: 'fabs' was not declared in this scope if(fabs(vcp) < eps) ^ main.cpp: In function 'double dist(point, point)': main.cpp:133:78: error: 'sqrt' was not declared in this scope return sqrt((p1.x - p2.x) * (p1.x - p2.x) + (p1.y - p2.y) * (p1.y - p2.y)); ^ main.cpp: In function 'double normal(std::vector<point>&, int, int)': main.cpp:142:45: error: call of overloaded 'abs(double)' is ambiguous return abs(A * a[p2].x + B * a[p2].y + C) / dist(a[p1], a[p11]); ^ 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/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:92: /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/ostream:38, from /usr/include/c++/6/iostream:39, from main.cpp:92: /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 'int main()': main.cpp:162:58: error: 'fabs' was not declared in this scope if( ((y - v[0].y) <= -eps) || ( (fabs(y - v[0].y) < eps) && ( (x - v[0].x) <= eps))) ^ main.cpp:166:27: error: 'sort' was not declared in this scope sort(v + 1, v + n, cmp); ^ main.cpp:184:28: error: 'setprecision' was not declared in this scope fout << setprecision(12); ^ Non zero exit status: 1