Compilare: main.cpp: In function 'int main()': main.cpp:83:27: warning: array subscript has type 'char' [-Wchar-subscripts] if(fv[a[i]]==0) ^ main.cpp:85:27: warning: array subscript has type 'char' [-Wchar-subscripts] if(fv[a[i]]==0) ^ main.cpp:87:26: warning: array subscript has type 'char' [-Wchar-subscripts] ++fv[a[i]]; ^ main.cpp:94:27: warning: array subscript has type 'char' [-Wchar-subscripts] if(fv[b[i]]==0) ^ main.cpp:96:26: warning: array subscript has type 'char' [-Wchar-subscripts] ++fv[b[i]]; ^