Compilare: main.cpp: In function 'void add(trie*, char*)': main.cpp:29:27: warning: array subscript has type 'char' [-Wchar-subscripts] if (rad->f[ poz[*s] ] == NULL){ ^ main.cpp:30:27: warning: array subscript has type 'char' [-Wchar-subscripts] rad->f[ poz[*s] ] = new trie; ^ main.cpp:34:28: warning: array subscript has type 'char' [-Wchar-subscripts] add (rad->f[ poz[*s] ], s+1); ^ main.cpp:75:19: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] rad->ch = NULL; ^~~~ main.cpp: In function 'void afis(trie*)': main.cpp:80:20: warning: NULL used in arithmetic [-Wpointer-arith] if (rad->ch == NULL) ^~~~ main.cpp:85:28: warning: array subscript has type 'char' [-Wchar-subscripts] if (rad->f[ poz[rad->ch] ]) ^ main.cpp:86:34: warning: array subscript has type 'char' [-Wchar-subscripts] afis (rad->f[ poz[rad->ch] ]); ^