Eroare de compilare: user.cpp:2:21: error: fstream.h: No such file or directory user.cpp:9: error: variable ‘std::ifstream f’ has initializer but incomplete type user.cpp:10: error: variable ‘std::ofstream g’ has initializer but incomplete type user.cpp: In function ‘int main()’: user.cpp:49: error: expected primary-expression before ‘}’ token user.cpp:49: error: expected ‘;’ before ‘}’ token user.cpp:21: warning: unused variable ‘c’