Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:23:16: error: variable ‘std::ifstream in’ has initializer but incomplete type ifstream in("trapez.in"); ^ user.cpp:24:17: error: variable ‘std::ofstream out’ has initializer but incomplete type ofstream out("trapez.out"); ^ user.cpp:35:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= v.size(); i++){ ^ user.cpp:36:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j <= v.size(); j++){ ^ user.cpp:43:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < pv.size(); i++){ ^