Eroare de compilare: user.c:3: error: expected specifier-qualifier-list before ‘nod’ user.c:4: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token user.c: In function ‘adauga’: user.c:8: error: ‘nod’ undeclared (first use in this function) user.c:8: error: (Each undeclared identifier is reported only once user.c:8: error: for each function it appears in.) user.c:8: error: ‘d’ undeclared (first use in this function) user.c:10: error: ‘new’ undeclared (first use in this function) user.c:10: error: expected ‘;’ before ‘nod’ user.c:12: error: ‘a’ undeclared (first use in this function) user.c: In function ‘actualizare’: user.c:17: error: ‘nod’ undeclared (first use in this function) user.c:17: error: ‘d’ undeclared (first use in this function) user.c:18: error: ‘a’ undeclared (first use in this function) user.c: In function ‘main’: user.c:31: error: ‘a’ undeclared (first use in this function) user.c:28: warning: unused variable ‘nr’ user.c:27: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result user.c:36: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result