Compilare: user.c: In function ‘get_fields’: user.c:36:6: warning: variable ‘n’ set but not used [-Wunused-but-set-variable] int n = 0; ^ user.c: In function ‘main’: user.c:87:3: warning: implicit declaration of function ‘strdup’ [-Wimplicit-function-declaration] char *s_cp = strdup(s); ^ user.c:87:16: warning: initialization makes pointer from integer without a cast [enabled by default] char *s_cp = strdup(s); ^