Compilare: user.cpp: In function ‘int main()’: user.cpp:18:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(b[s[i]]==0) ^ user.cpp:19:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[s[i]]=ss[i]; ^ user.cpp:20:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(b[s[i]]!=ss[i]) ^ user.cpp:28:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(b[i]!=0) ^ user.cpp:29:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] fout<<i<<" "<<b[i]<<"\n"; ^