Compilare: main.cpp: In function 'int main()': main.cpp:29:12: warning: array subscript has type 'char' [-Wchar-subscripts] 29 | f[msg[i]] ++; | ~~~~~^ main.cpp:30:23: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | appcr[i] = f[msg[i]]; | ~~~~~^ main.cpp:59:18: warning: array subscript has type 'char' [-Wchar-subscripts] 59 | inv = 2 * (f[sh] + f[reverse(sh)]); | ^~ main.cpp:73:14: warning: array subscript has type 'char' [-Wchar-subscripts] 73 | x += f[osh] + 2 * f[reverse(osh)]; | ^~~ main.cpp:75:14: warning: array subscript has type 'char' [-Wchar-subscripts] 75 | x += f[osh] + f[reverse(osh)]; | ^~~