Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp:2:22: error: iostream.h: No such file or directory user.cpp:3: error: ‘ifstream’ does not name a type user.cpp:4: error: ‘ofstream’ does not name a type user.cpp: In function ‘int main()’: user.cpp:9: error: ‘fin’ was not declared in this scope user.cpp:24: error: ‘fout’ was not declared in this scope user.cpp:26: error: ‘fout’ was not declared in this scope user.cpp:28: error: ‘fout’ was not declared in this scope user.cpp:8: warning: unused variable ‘nr’