Eroare de compilare: user.cpp:1:21: error: fstream.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:10: error: ‘in’ was not declared in this scope user.cpp:18: warning: comparison between signed and unsigned integer expressions user.cpp:20: warning: comparison between signed and unsigned integer expressions user.cpp:44: error: ‘out’ was not declared in this scope user.cpp:50: error: ‘out’ was not declared in this scope