Compilare: user.cpp: In function ‘bool fact()’: user.cpp:109:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:109:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[s[p]]=!v[s[p]]; ^ user.cpp:110:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp:114:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[s[p]]; ^ user.cpp: In function ‘bool exp()’: user.cpp:74:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘bool fact()’: user.cpp:120:1: warning: control reaches end of non-void function [-Wreturn-type] } ^