Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp:10: error: variable ‘std::ifstream fin’ has initializer but incomplete type user.cpp:11: error: variable ‘std::ofstream fout’ has initializer but incomplete type user.cpp: In function ‘int getNext(int, char)’: user.cpp:22: warning: comparison between signed and unsigned integer expressions user.cpp: In function ‘void addTrie(const std::string&)’: user.cpp:30: warning: unused variable ‘i’ user.cpp: In function ‘int main()’: user.cpp:64: warning: unused variable ‘j’