Compilare: user.cpp: In function ‘int factor()’: user.cpp:72:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] nr=v[*P]; ^ user.cpp: In function ‘int main()’: user.cpp:106:18: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[chng[i]]=comute(v[chng[i]]); ^ user.cpp:106:36: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[chng[i]]=comute(v[chng[i]]); ^ user.cpp: In function ‘int factor()’: user.cpp:94:1: warning: control reaches end of non-void function [-Wreturn-type] } ^