> I would agree with your assessment, but the other part that I cannot 
> figure,
> is why have a switch statement? It does nothing except fall straight 
> through
> to the default case.

Actually, just like any other switch statement, it does do an jump to the 
numbered cases.

Syntactically, a switch statement is defined as:

    switch ( <expression> ) <statement-with-case-labels-in-it>

Under normal circumstances <statement-with-case-labels-in-it> is a compound 
statement (i.e.):

{
        <statement>; ....
}

But it works just as well if <statement-with-case-labels-in-it> is replaced 
by something like a <if-statement>:

default:
    if (lala)
        case x: case y: do_something();
    else
        case z: do_something_else();

or a <while-statement>

or even a null statement!:

switch (<expression>) ;

which of course is exactly the same as

<expression>;

In all these cases the compiler is supposed to generate code to go to the 
case label that matches the <expression>, if there is one, or to the 
default: label if there is no match, or to the end of the 
<statement-with-case-labels-in-it> if there is no match and there is no 
default: label.

Funny stuff indeed.

Bob Ammerman
RAm Systems




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