Compilare: main.cpp: In function 'int main()': main.cpp:25:30: warning: array subscript has type 'char' [-Wchar-subscripts] cur=val[s[dr]]; ^ main.cpp:35:34: warning: array subscript has type 'char' [-Wchar-subscripts] inq[val[s[st]]]--; ^ main.cpp:42:29: warning: array subscript has type 'char' [-Wchar-subscripts] inq[val[s[k]]]=0; ^