Compilare: user.cpp: In function ‘bool fact()’: user.cpp:100:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:100:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:101:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp:105:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp: In function ‘bool exp()’: user.cpp:80:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool fact()’: user.cpp:111:1: warning: control reaches end of non-void function [-Wreturn-type] } ^