Eroare de compilare: user.c: In function ‘delete’: user.c:56:2: error: incompatible type for argument 1 of ‘free’ free(*h[*last]); ^ In file included from user.c:2:0: /usr/include/stdlib.h:488:13: note: expected ‘void *’ but argument is of type ‘arc’ extern void free (void *__ptr) __THROW; ^ user.c: In function ‘main’: user.c:111:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d\n", &n, &m); ^ user.c:119:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &a, &b, &c); ^