Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:4: error: ‘ifstream’ was not declared in this scope user.cpp:4: error: expected ‘;’ before ‘f’ user.cpp:5: error: ‘ofstream’ was not declared in this scope user.cpp:5: error: expected ‘;’ before ‘g’ user.cpp:6: warning: statement has no effect user.cpp:7: warning: suggest parentheses around ‘+’ inside ‘<<’ user.cpp:7: warning: statement has no effect user.cpp:8: error: request for member ‘close’ in ‘f’, which is of non-class type ‘int’ user.cpp:8: error: request for member ‘close’ in ‘g’, which is of non-class type ‘int’