Eroare de compilare: main.cpp: In function 'int main()': main.cpp:25:5: error: 'ifstream' was not declared in this scope ifstream f ("datorii.in"); ^~~~~~~~ main.cpp:25:5: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:2: /usr/include/c++/6/iosfwd:162:34: note: 'std::ifstream' typedef basic_ifstream<char> ifstream; ^~~~~~~~ main.cpp:26:5: error: 'ofstream' was not declared in this scope ofstream g("datorii.out"); ^~~~~~~~ main.cpp:26:5: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:2: /usr/include/c++/6/iosfwd:165:34: note: 'std::ofstream' typedef basic_ofstream<char> ofstream; ^~~~~~~~ main.cpp:27:5: error: 'f' was not declared in this scope f>>n>>Q; ^ main.cpp:41:13: error: 'g' was not declared in this scope g<< query(b) - query(a - 1); ^ main.cpp:35:36: warning: unused variable 'Sum' [-Wunused-variable] int Tip = 0, a = 0, b = 0, Sum = 0; ^~~ Non zero exit status: 1