Compilare: user.cpp: In function ‘void add_cuv(int)’: user.cpp:44:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] cur = arb[cur].next[v[i]]; ^ user.cpp:52:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] arb[cur].next[v[i]] = adr; ^ user.cpp: In function ‘void del_cuv(int)’: user.cpp:63:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] cur = arb[cur].next[v[i]]; ^ user.cpp: In function ‘int search_cuv(int, int)’: user.cpp:87:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] cur = arb[cur].next[v[i]]; ^ user.cpp: In function ‘int main()’: user.cpp:105:7: warning: unused variable ‘adr’ [-Wunused-variable] int adr = get_adr (); ^~~