Eroare de compilare: user.c:1:19: error: fstream: No such file or directory user.c:2: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token user.c:3: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token user.c: In function 'main': user.c:45: error: 'in' undeclared (first use in this function) user.c:45: error: (Each undeclared identifier is reported only once user.c:45: error: for each function it appears in.) user.c:46: error: 'new' undeclared (first use in this function) user.c:46: error: expected ',' or ';' before 'int' user.c:54: error: 'out' undeclared (first use in this function)