Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:38: error: ‘ifstream’ was not declared in this scope user.cpp:38: error: expected ‘;’ before ‘in’ user.cpp:39: error: ‘ofstream’ was not declared in this scope user.cpp:39: error: expected ‘;’ before ‘out’ user.cpp:40: error: ‘in’ was not declared in this scope user.cpp:46: warning: comparison between signed and unsigned integer expressions user.cpp:47: warning: comparison between signed and unsigned integer expressions user.cpp:60: error: ‘out’ was not declared in this scope user.cpp:61: error: ‘out’ was not declared in this scope