Compilare: user.cpp: In function ‘int main()’: user.cpp:15:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[s[i]]==0) ^ user.cpp:17:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[i]]++; ^ user.cpp:18:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz[s[i]]=i; ^ user.cpp:24:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] s[poz[s[i]]]='-'; ^ user.cpp:25:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] poz[s[i]]=i; ^