Eroare de compilare: user.cpp:2:1: error: ‘ifstream’ does not name a type ifstream fin("infasuratoare.in"); ^ user.cpp:3:1: error: ‘ofstream’ does not name a type ofstream fout("infasuratoare.out"); ^ user.cpp: In function ‘void hull()’: user.cpp:43:2: error: ‘fout’ was not declared in this scope fout<<down.size()-2+up.size()<<'\n'; ^ user.cpp:44:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<down.size();i++) ^ user.cpp: In function ‘int main()’: user.cpp:53:5: error: ‘fin’ was not declared in this scope fin>>n; ^