Eroare de compilare: user.cpp: In function ‘void q()’: user.cpp:69:87: error: call of overloaded ‘abs(double)’ is ambiguous if((v[j].nrd == v[i].nrd) && abs((distanta(v[i].x, v[i].y)-distanta(v[j].x, v[j].y))) && nr[j]+1>nr[i]) ^ user.cpp:69:87: note: candidates are: In file included from /usr/include/c++/4.8/cstdlib:72:0, from /usr/include/c++/4.8/ext/string_conversions.h:41, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:2: /usr/include/stdlib.h:771:12: note: int abs(int) extern int abs (int __x) __THROW __attribute__ ((__const__)) __wur; ^ user.cpp:18:7: note: float abs(float) float abs(float x) ^ In file included from /usr/include/c++/4.8/ext/string_conversions.h:41:0, from /usr/include/c++/4.8/bits/basic_string.h:2815, from /usr/include/c++/4.8/string:52, from /usr/include/c++/4.8/bits/locale_classes.h:40, from /usr/include/c++/4.8/bits/ios_base.h:41, from /usr/include/c++/4.8/ios:42, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:2: /usr/include/c++/4.8/cstdlib:174:3: note: long long int std::abs(long long int) abs(long long __x) { return __builtin_llabs (__x); } ^ /usr/include/c++/4.8/cstdlib:166:3: note: long int std::abs(long int) abs(long __i) { return __builtin_labs(__i); } ^ user.cpp: In function ‘int main()’: user.cpp:90:8: warning: the address of ‘int m()’ will always evaluate as ‘true’ [-Waddress] cout<<m<<" "; ^