Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:21: error: ‘ifstream’ was not declared in this scope user.cpp:21: error: expected ‘;’ before ‘f’ user.cpp:22: error: ‘ofstream’ was not declared in this scope user.cpp:22: error: expected ‘;’ before ‘g’ user.cpp:23: error: ‘f’ was not declared in this scope user.cpp:33: error: ‘g’ was not declared in this scope user.cpp:20: warning: unused variable ‘sol’ user.cpp:20: warning: unused variable ‘nr’