how has C bitten you?

[Tim Smith]

> > Consider, for example, the following program fragment:
> > 
> > 	int i, a[10];
> > 	for (i = 0; i <= 10; i++)
> > 		a[i] = 0;
> > 
> > On many implementations, this will result in an infinite loop.
> 
> This looks to me like it will simply overwrite one int's worth of
> memory beyond the end of the array "a" with the value 0.  Granted,
> depending on what happens to be after "a", this can have disastrous
> results, but is there really an implementation in which it will
> (reliably) lead to infinte looping?
> 
The UniSoft System V C compiler for the 68k will reliably produce an
infinite loop here.  Note that i and a[] are both on the stack.  This
is what you get: ( high address higher up on page )

	i:	4 bytes
	a[9]:	4 bytes
	.
	.
	.
	a[0]	4 bytes

a[10] will overwrite i.
-- 
					Tim Smith
				ihnp4!{cithep,wlbr!callan}!tim
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