Yes, although we're usually not particularly interested in requested
features or suggestions without a detailed and carefully thought out
proposal, preferably with a "champion" who's willing to attend committee
meetings, present the proposal, solicit feedback, etc. We're also not
particularly interested in suggestions unless we're actively working on
revising the standard, which we're not at the moment.
Two more points. First, be sure your suggestion is
for something that is significantly useful. There
was a long list of features considered but not
adopted for the 1989 C standard, and it would be
wise to review those before bringing up the same
old proposals all over again. Your rationale for
the inclusion of a new feature should include one
or more of: (a) it provides something that is
needed from time to time which is impractical to
code in Standard C as it exists; (b) it provides a
standard specification for some portable function
that many programmers have independently reinvented;
(c) it facilitates some common operation which is
otherwise tedious to code; (d) it permits more
extensive optimization of generated code; (e) it
provides better support for some other important
standard; (f) it permits better compile-time checks.
Second, it helps us evaluate the ramifications of
making a change if there is at least one existing
implementation with a significant number of users.
You might add the feature to LCC or GCC, perhaps.