Compilare: main.cpp: In function 'int main()': main.cpp:22:25: warning: array subscript has type 'char' [-Wchar-subscripts] 22 | cin >> c, f[c]++; | ^ main.cpp:30:20: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | else if (f[c1] % 2 == f[c2] % 2 && f[c1] % 2 == f[c3] % 2) | ^~ main.cpp:30:33: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | else if (f[c1] % 2 == f[c2] % 2 && f[c1] % 2 == f[c3] % 2) | ^~ main.cpp:30:46: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | else if (f[c1] % 2 == f[c2] % 2 && f[c1] % 2 == f[c3] % 2) | ^~ main.cpp:30:59: warning: array subscript has type 'char' [-Wchar-subscripts] 30 | else if (f[c1] % 2 == f[c2] % 2 && f[c1] % 2 == f[c3] % 2) | ^~ main.cpp:24:17: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] 24 | if (b != c) | ^~