#undef
(Preprocessor Statement)
Makes a symbol constant defined with #define or macro definition invalid.
#undef {<Symbol constant>|<Macro name>}
This statement makes a symbol constant defined with #define or macro definition invalid in the program after this #undef. Designate only the macro name for a macro with an argument.
|
#UNDEF NAME
|
'Makes NAME defined with a symbol definition or
'macro definition in the #DEFINE statement invalid.
|