Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:8: error: ‘ifstream’ was not declared in this scope user.cpp:8: error: expected ‘;’ before ‘in’ user.cpp:9: error: ‘ofstream’ was not declared in this scope user.cpp:9: error: expected ‘;’ before ‘out’ user.cpp:13: error: ‘in’ was not declared in this scope user.cpp:31: error: ‘out’ was not declared in this scope user.cpp:10: warning: unused variable ‘vj’