Compilare: user.cpp: In function ‘void PreProcess_Dictionary()’: user.cpp:17:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] dictionary[A[i]]=len-i; ^ user.cpp: In function ‘void Search_Pattern()’: user.cpp:30:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] j+=dictionary[B[i+j]]; ^