Compilare: main.cpp: In function 'void init(trie*, int, int)': main.cpp:24:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (j == c[ind].size()) ~~^~~~~~~~~~~~~~~~ main.cpp:30:28: warning: array subscript has type 'char' [-Wchar-subscripts] if (nod -> f[bij[c[ind][j]]] == NULL) ^ main.cpp:30:29: warning: array subscript has type 'char' [-Wchar-subscripts] if (nod -> f[bij[c[ind][j]]] == NULL) ^ main.cpp:32:25: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> f[bij[c[ind][j]]] = new trie; ^ main.cpp:32:26: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> f[bij[c[ind][j]]] = new trie; ^ main.cpp:33:25: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> f[bij[c[ind][j]]] -> p.second = ind; ^ main.cpp:33:26: warning: array subscript has type 'char' [-Wchar-subscripts] nod -> f[bij[c[ind][j]]] -> p.second = ind; ^ main.cpp:35:30: warning: array subscript has type 'char' [-Wchar-subscripts] init (nod -> f[bij[c[ind][j]]], ind, j+1); ^ main.cpp:35:31: warning: array subscript has type 'char' [-Wchar-subscripts] init (nod -> f[bij[c[ind][j]]], ind, j+1); ^ main.cpp: In function 'void update(trie*, char*, int, int&)': main.cpp:50:26: warning: array subscript has type 'char' [-Wchar-subscripts] update(nod -> f[bij[c[0]]], c+1, x, ind); ^ main.cpp:50:27: warning: array subscript has type 'char' [-Wchar-subscripts] update(nod -> f[bij[c[0]]], c+1, x, ind); ^ main.cpp: In function 'int query(trie*, char*)': main.cpp:62:24: warning: array subscript has type 'char' [-Wchar-subscripts] if (nod -> f[bij[c[0]]] == NULL) ^ main.cpp:62:25: warning: array subscript has type 'char' [-Wchar-subscripts] if (nod -> f[bij[c[0]]] == NULL) ^ main.cpp:64:34: warning: array subscript has type 'char' [-Wchar-subscripts] return query (nod -> f[bij[c[0]]], c+1); ^ main.cpp:64:35: warning: array subscript has type 'char' [-Wchar-subscripts] return query (nod -> f[bij[c[0]]], c+1); ^