Whats the best way to create a “#define macro” for “NULL” in C++?
The best way is: don’t do it. The most portable way to compare against the nil ptr is to compare against “0”. Some programmers use a #define to set NULL to “0”, but that can conflict with the way the standard libraries #define NULL. There is no portable way to define a “const” ptr called “NULL” that can be compared against any arbitrary ptr — the literal “0” is acceptable for this however.
