Compilare: user.c: In function ‘main’: user.c:42:23: warning: assignment from incompatible pointer type [enabled by default] curr->next = base; ^ user.c:50:15: warning: assignment from incompatible pointer type [enabled by default] p1 = p->next; ^ user.c:54:20: warning: assignment from incompatible pointer type [enabled by default] p = p->next; ^ user.c:56:21: warning: assignment from incompatible pointer type [enabled by default] p1 = p1->next; ^ user.c:59:20: warning: assignment from incompatible pointer type [enabled by default] p->next = curr; ^ user.c:60:22: warning: assignment from incompatible pointer type [enabled by default] curr->next= p1; ^ user.c:71:13: warning: assignment from incompatible pointer type [enabled by default] p = p->next; ^ user.c:23:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(FIN, "r", stdin); ^ user.c:24:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(FOUT, "w", stdout); ^ user.c:26:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.c:28:33: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] for(i = 0; i < n; ++i) scanf("%d", &vec[i]); ^