Eroare de compilare: user.c:1:19: fstream: No such file or directory user.c:3: error: syntax error before "namespace" user.c:3: warning: type defaults to `int' in declaration of `std' user.c:3: warning: data definition has no type or storage class user.c: In function `main': user.c:10: error: `ifstream' undeclared (first use in this function) user.c:10: error: (Each undeclared identifier is reported only once user.c:10: error: for each function it appears in.) user.c:10: error: syntax error before "fin" user.c:11: error: `ofstream' undeclared (first use in this function) user.c:12: error: `fin' undeclared (first use in this function) user.c:17: error: `fout' undeclared (first use in this function)