Compilare: user.cpp: In function ‘int main()’: user.cpp:26:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[a[0]]++; ^ user.cpp:33:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(b[a[jv]] == 0) ^ user.cpp:35:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[a[jv]]++; ^ user.cpp:39:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[a[jv]]++; ^ user.cpp:49:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] b[a[iv]]--; ^ user.cpp:50:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if( b[a[iv]] == 0) l--; ^