There continues to define a macro in another class method among

That there is no way to continue to define a macro as in (class1)

# Define num (x) x == 0? 1:2
Continue to want to define
in (class2) insidenum (x) x == 1? 3:2
Reply:
As you do this you put into your macro member function bar.
Reply:
Allowed to redefine
Reply:
First # undef xxx
Then # define xxx
Reply:
After this test, not a reference to the third floor

reply:

first # undef xxx
Then # define xxx

Reply:
After this test, not a reference to the third floor

reply:

first # undef xxx
Then # define xxx