Eroare de compilare: user.c:1:20: error: fstream.h: No such file or directory user.c: In function 'main': user.c:3: error: 'ifstream' undeclared (first use in this function) user.c:3: error: (Each undeclared identifier is reported only once user.c:3: error: for each function it appears in.) user.c:3: error: expected ';' before 'q' user.c:4: error: 'ofstream' undeclared (first use in this function) user.c:4: error: expected ';' before 'w' user.c:7: error: 'q' undeclared (first use in this function) user.c:26: error: 'w' undeclared (first use in this function)