Compilare: user.c: In function ‘main’: user.c:20:20: warning: value computed is not used [-Wunused-value] for(k=a;*k;*k++) { ^ user.c:22:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!r->l[*k]) ^ user.c:23:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] r->l[*k]=V(); ^ user.c:17:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in","r",stdin),freopen("ahocorasick.out","w",stdout),fgets(e,1000001,stdin),scanf("%d\n",&n),r=V(); ^ user.c:17:48: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in","r",stdin),freopen("ahocorasick.out","w",stdout),fgets(e,1000001,stdin),scanf("%d\n",&n),r=V(); ^ user.c:17:84: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in","r",stdin),freopen("ahocorasick.out","w",stdout),fgets(e,1000001,stdin),scanf("%d\n",&n),r=V(); ^ user.c:17:107: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("ahocorasick.in","r",stdin),freopen("ahocorasick.out","w",stdout),fgets(e,1000001,stdin),scanf("%d\n",&n),r=V(); ^ user.c:19:14: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result [-Wunused-result] fgets(a,10001,stdin); ^