Eroare de compilare: main.cpp:14:1: error: 'vector' does not name a type vector <int>ans; ^~~~~~ main.cpp: In function 'double area(int, int, int, int, int, int)': main.cpp:17:56: error: call of overloaded 'abs(double)' is ambiguous return abs((x1*(y2-y3) + x2*(y3-y1)+ x3*(y1-y2))/2.0); ^ 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:2: /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:2: /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:46:19: error: 'ans' was not declared in this scope cnt++,ans.push_back(i); ^~~ main.cpp:51:14: error: 'ans' was not declared in this scope out<<ans[i]<<" "; ^~~ main.cpp:34:11: warning: unused variable 'x1' [-Wunused-variable] int n,x1,y1,x2,y2,x3,y3,x,y; ^~ main.cpp:34:14: warning: unused variable 'y1' [-Wunused-variable] int n,x1,y1,x2,y2,x3,y3,x,y; ^~ main.cpp:34:17: warning: unused variable 'x2' [-Wunused-variable] int n,x1,y1,x2,y2,x3,y3,x,y; Non zero exit status: 1