#:



I recently wrote a teensy program to play a small tune, and used

the line



#define  C#  271



to define the integer frequency of C Sharp. The compiler (BC++4)

objected to the # in C#. I thought the preprocessor was a true

macro processor, and could handle abominations like that. Why was I

wrong?



_:



I've always been puzzled by the use of the leading underscore in C

programs. It's a standard character like a,b,c as far as the

compiler is concerned, but it appears at the front of some

constants and functions as if it has some magical significance.

What is this significance?



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