Compilare: main.cpp: In function 'int main()': main.cpp:16:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(vu[c[i]]==1 && vd[c[i]]==0) ^ main.cpp:16:34: warning: array subscript has type 'char' [-Wchar-subscripts] if(vu[c[i]]==1 && vd[c[i]]==0) ^ main.cpp:20:20: warning: array subscript has type 'char' [-Wchar-subscripts] vd[c[i]]=1; ^ main.cpp:22:19: warning: array subscript has type 'char' [-Wchar-subscripts] if(vu[c[i]]==0) ^ main.cpp:24:20: warning: array subscript has type 'char' [-Wchar-subscripts] vu[c[i]]=1; ^