Compilare: main.cpp: In function 'int variabila()': main.cpp:65:24: warning: array subscript has type 'char' [-Wchar-subscripts] 65 | return fr[t[j++]]; | ~~~~~^ main.cpp: In function 'int main()': main.cpp:125:12: warning: array subscript has type 'char' [-Wchar-subscripts] 125 | fr[carac] = 1 - fr[carac]; | ^~~~~ main.cpp:125:28: warning: array subscript has type 'char' [-Wchar-subscripts] 125 | fr[carac] = 1 - fr[carac]; | ^~~~~