Compilare: user.cpp: In function ‘int main()’: user.cpp:20:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] freq[v[i]]++; ^ user.cpp:26:41: warning: array subscript has type ‘char’ [-Wchar-subscripts] while( j-1>=0 && freq[v[j-1]]>1 && v[j-1]>v[j]) ^ user.cpp:28:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] freq[v[j-1]]--; ^ user.cpp:35:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(freq[v[i]]>1) ^ user.cpp:37:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] freq[v[i]]--; ^