Compilare: main.cpp: In member function 'void pal_tree::ins(int)': main.cpp:34:23: warning: array subscript has type 'char' [-Wchar-subscripts] if(v[p].fiu[ch]) ^ main.cpp:36:26: warning: array subscript has type 'char' [-Wchar-subscripts] v[v[p].fiu[ch]].ap++; ^ main.cpp:37:32: warning: array subscript has type 'char' [-Wchar-subscripts] wh[poz]=v[p].fiu[ch]; ^ main.cpp:42:20: warning: array subscript has type 'char' [-Wchar-subscripts] v[p].fiu[ch]=nodes; ^ main.cpp:54:24: warning: array subscript has type 'char' [-Wchar-subscripts] p=v[p].fiu[ch]; ^