Eroare de compilare: user.c: In function ‘add’: user.c:19: warning: assignment from incompatible pointer type user.c:21: warning: assignment from incompatible pointer type user.c: In function ‘dft’: user.c:34: warning: passing argument 1 of ‘add’ from incompatible pointer type user.c:16: note: expected ‘struct node **’ but argument is of type ‘struct node *’ user.c: In function ‘main’: user.c:57: error: redeclaration of ‘index’ with no linkage user.c:51: note: previous declaration of ‘index’ was here user.c:57: error: ‘for’ loop initial declarations are only allowed in C99 mode user.c:57: note: use option -std=c99 or -std=gnu99 to compile your code user.c:59: warning: passing argument 1 of ‘add’ from incompatible pointer type user.c:16: note: expected ‘struct node **’ but argument is of type ‘struct node *’ user.c:60: warning: passing argument 1 of ‘add’ from incompatible pointer type user.c:16: note: expected ‘struct node **’ but argument is of type ‘struct node *’ user.c:71: error: incompatible type for argument 1 of ‘free’ /usr/include/stdlib.h:488: note: expected ‘void *’ but argument is of type ‘node’ user.c:56: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result user.c:58: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result