Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:5: error: ‘ifstream’ was not declared in this scope user.cpp:5: error: expected ‘;’ before ‘f’ user.cpp:6: error: ‘ofstream’ was not declared in this scope user.cpp:6: error: expected ‘;’ before ‘g’ user.cpp:10: warning: statement has no effect user.cpp:11: warning: statement has no effect user.cpp:12: warning: statement has no effect user.cpp:13: warning: statement has no effect user.cpp:16: warning: suggest parentheses around assignment used as truth value user.cpp:20: warning: statement has no effect user.cpp:30: warning: statement has no effect user.cpp:35: warning: statement has no effect