Eroare de compilare: user.c:2:19: error: fstream: No such file or directory user.c: In function ‘main’: user.c:6: error: ‘ifstream’ undeclared (first use in this function) user.c:6: error: (Each undeclared identifier is reported only once user.c:6: error: for each function it appears in.) user.c:6: error: expected ‘;’ before ‘f’ user.c:7: error: ‘ofstream’ undeclared (first use in this function) user.c:7: error: expected ‘;’ before ‘g’ user.c:9: error: ‘f’ undeclared (first use in this function) user.c:15: error: expected expression before ‘.’ token user.c:20: error: ‘g’ undeclared (first use in this function)