Is objective C 2.0 a proper superset of C?

Question

I\'ve heard that objective-C is a proper superset of C, but is objective-C 2.0?

The reason I ask is that either it isn\'t, or I misunderstand the phrase \'proper sup

Answer 1

Objective-C a proper superset of C, as everything that works in C will work with Objective-C.

BUT,

as it is a superset, it adds some new types, definitions and directives.

That means that if you use a reserved definition like nil, you are getting into serious trouble.

That's why the above program does not compile.