Compilare: user.cpp: In function ‘int main()’: user.cpp:18:29: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(i=0;i<n;i++) ap[s[i]]++; ^ user.cpp:25:52: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]<=stiva[p] && p>=0 && ap[stiva[p]]>1 && apare_deja[s[i]]==0) ^ user.cpp:25:74: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(s[i]<=stiva[p] && p>=0 && ap[stiva[p]]>1 && apare_deja[s[i]]==0) ^ user.cpp:28:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[stiva[p]]--; ^ user.cpp:29:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] apare_deja[stiva[p]]=0; ^ user.cpp:32:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(apare_deja[s[i]]==0) ^ user.cpp:36:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] apare_deja[s[i]]=1; ^ user.cpp:39:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(ap[stiva[p]]>1) ^ user.cpp:42:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[stiva[p]]--; ^