Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:10: error: ‘ifstream’ was not declared in this scope user.cpp:10: error: expected ‘;’ before ‘in’ user.cpp:11: error: ‘ofstream’ was not declared in this scope user.cpp:11: error: expected ‘;’ before ‘out’ user.cpp:13: error: ‘in’ was not declared in this scope user.cpp:14: error: ‘strlen’ was not declared in this scope user.cpp:15: warning: right-hand operand of comma has no effect user.cpp:15: error: expected ‘;’ before ‘)’ token user.cpp:20: error: ‘out’ was not declared in this scope user.cpp:22: error: expected primary-expression before ‘return’ user.cpp:22: error: expected ‘)’ before ‘return’