Compilare: main.cpp: In function 'void termen(int)': main.cpp:15:14: warning: array subscript has type 'char' [-Wchar-subscripts] ok[*p]=true; ^ main.cpp:18:20: warning: array subscript has type 'char' [-Wchar-subscripts] ++fr[*p]; ^ main.cpp:22:20: warning: array subscript has type 'char' [-Wchar-subscripts] --fr[*p]; ^ main.cpp: In function 'int main()': main.cpp:55:16: warning: iteration 8 invokes undefined behavior [-Waggressive-loop-optimizations] if(ok[i]) ~~~~^ main.cpp:53:20: note: within this loop for(int i='a';i<='z';i++) ~^~~~~