Compilare: main.cpp: In function 'bool fact()': main.cpp:48:28: warning: array subscript has type 'char' [-Wchar-subscripts] 48 | return (val[s[ind++]] + ok) % 2; | ~~~~~~~^ main.cpp: In function 'int main()': main.cpp:102:13: warning: array subscript has type 'char' [-Wchar-subscripts] 102 | val[ch] = (val[ch] + 1) % 2; | ^~ main.cpp:102:24: warning: array subscript has type 'char' [-Wchar-subscripts] 102 | val[ch] = (val[ch] + 1) % 2; | ^~ main.cpp:89:15: warning: unused variable 'j' [-Wunused-variable] 89 | int n, i, j; | ^