Compilare: main.cpp: In function 'int main()': main.cpp:15:12: warning: array subscript has type 'char' [-Wchar-subscripts] 15 | fr[ch]=x; | ^~ main.cpp:22:34: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | if (s[i+1]==0&&sum+fr[s[i]]<=lg) | ~~~^ main.cpp:27:23: warning: array subscript has type 'char' [-Wchar-subscripts] 27 | if (sum+fr[s[i]]>lg-3) | ~~~^ main.cpp:33:20: warning: array subscript has type 'char' [-Wchar-subscripts] 33 | sum+=fr[s[i]]; | ~~~^