Compilare: user.cpp: In function ‘bool fact()’: user.cpp:101:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:101:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:102:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp:106:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp: In function ‘bool exp()’: user.cpp:81:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool fact()’: user.cpp:112:1: warning: control reaches end of non-void function [-Wreturn-type] } ^