Compilare: user.cpp: In function ‘int main()’: user.cpp:32:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[x] = !val[x]; ^ user.cpp:32:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] val[x] = !val[x]; ^ user.cpp:23:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp: In function ‘bool Solve()’: user.cpp:66:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( so[h] == 2 ) sn[h] = val[x] && sn[h]; ^ user.cpp:67:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( so[h] == 3 ) sn[h] = val[x] || sn[h]; ^ user.cpp:68:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( so[h] == 4 ) sn[h] = (!val[x]) && sn[h]; ^ user.cpp:69:58: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( so[h] == 5 ) sn[h] = (!val[x]) || sn[h]; ^ user.cpp:70:57: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( so[h] == 6 ) sn[h] = !val[x]; ^ user.cpp:74:38: warning: array subscript has type ‘char’ [-Wchar-subscripts] sn[h] = val[x]; ^ user.cpp:45:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^