Compilare: user.cpp: In function ‘int main()’: user.cpp:98:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(pozc != &rad && !pozc->f[a[i]]) { ^ user.cpp:107:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] pozc = pozc->f[a[i]]; ^